diff --git a/app/api/endpoints/download.py b/app/api/endpoints/download.py
index 9750c00b..8f1d2fb5 100644
--- a/app/api/endpoints/download.py
+++ b/app/api/endpoints/download.py
@@ -1,7 +1,6 @@
 from typing import Any, List
 
 from fastapi import APIRouter, Depends, HTTPException
-from sqlalchemy.orm import Session
 
 from app import schemas
 from app.chain.douban import DoubanChain
@@ -10,7 +9,6 @@ from app.chain.media import MediaChain
 from app.core.context import MediaInfo, Context, TorrentInfo
 from app.core.metainfo import MetaInfo
 from app.core.security import verify_token
-from app.db import get_db
 from app.schemas import NotExistMediaInfo, MediaType
 
 router = APIRouter()
@@ -18,19 +16,17 @@ router = APIRouter()
 
 @router.get("/", summary="正在下载", response_model=List[schemas.DownloadingTorrent])
 def read_downloading(
-        db: Session = Depends(get_db),
         _: schemas.TokenPayload = Depends(verify_token)) -> Any:
     """
     查询正在下载的任务
     """
-    return DownloadChain(db).downloading()
+    return DownloadChain().downloading()
 
 
 @router.post("/", summary="添加下载", response_model=schemas.Response)
 def add_downloading(
         media_in: schemas.MediaInfo,
         torrent_in: schemas.TorrentInfo,
-        db: Session = Depends(get_db),
         _: schemas.TokenPayload = Depends(verify_token)) -> Any:
     """
     添加下载任务
@@ -49,7 +45,7 @@ def add_downloading(
         media_info=mediainfo,
         torrent_info=torrentinfo
     )
-    did = DownloadChain(db).download_single(context=context)
+    did = DownloadChain().download_single(context=context)
     return schemas.Response(success=True if did else False, data={
         "download_id": did
     })
@@ -57,7 +53,6 @@ def add_downloading(
 
 @router.post("/notexists", summary="查询缺失媒体信息", response_model=List[NotExistMediaInfo])
 def exists(media_in: schemas.MediaInfo,
-           db: Session = Depends(get_db),
            _: schemas.TokenPayload = Depends(verify_token)) -> Any:
     """
     查询缺失媒体信息
@@ -80,7 +75,7 @@ def exists(media_in: schemas.MediaInfo,
     # 查询缺失信息
     if not mediainfo or not mediainfo.tmdb_id:
         raise HTTPException(status_code=404, detail="媒体信息不存在")
-    exist_flag, no_exists = DownloadChain(db).get_no_exists_info(meta=meta, mediainfo=mediainfo)
+    exist_flag, no_exists = DownloadChain().get_no_exists_info(meta=meta, mediainfo=mediainfo)
     if mediainfo.type == MediaType.MOVIE:
         # 电影已存在时返回空列表，存在时返回空对像列表
         return [] if exist_flag else [NotExistMediaInfo()]
@@ -93,34 +88,31 @@ def exists(media_in: schemas.MediaInfo,
 @router.get("/start/{hashString}", summary="开始任务", response_model=schemas.Response)
 def start_downloading(
         hashString: str,
-        db: Session = Depends(get_db),
         _: schemas.TokenPayload = Depends(verify_token)) -> Any:
     """
     开如下载任务
     """
-    ret = DownloadChain(db).set_downloading(hashString, "start")
+    ret = DownloadChain().set_downloading(hashString, "start")
     return schemas.Response(success=True if ret else False)
 
 
 @router.get("/stop/{hashString}", summary="暂停任务", response_model=schemas.Response)
 def stop_downloading(
         hashString: str,
-        db: Session = Depends(get_db),
         _: schemas.TokenPayload = Depends(verify_token)) -> Any:
     """
     控制下载任务
     """
-    ret = DownloadChain(db).set_downloading(hashString, "stop")
+    ret = DownloadChain().set_downloading(hashString, "stop")
     return schemas.Response(success=True if ret else False)
 
 
 @router.delete("/{hashString}", summary="删除下载任务", response_model=schemas.Response)
 def remove_downloading(
         hashString: str,
-        db: Session = Depends(get_db),
         _: schemas.TokenPayload = Depends(verify_token)) -> Any:
     """
     控制下载任务
     """
-    ret = DownloadChain(db).remove_downloading(hashString)
+    ret = DownloadChain().remove_downloading(hashString)
     return schemas.Response(success=True if ret else False)
diff --git a/app/api/endpoints/history.py b/app/api/endpoints/history.py
index ef98e257..786b02f7 100644
--- a/app/api/endpoints/history.py
+++ b/app/api/endpoints/history.py
@@ -75,10 +75,10 @@ def delete_transfer_history(history_in: schemas.TransferHistory,
         return schemas.Response(success=False, msg="记录不存在")
     # 册除媒体库文件
     if deletedest and history.dest:
-        TransferChain(db).delete_files(Path(history.dest))
+        TransferChain().delete_files(Path(history.dest))
     # 删除源文件
     if deletesrc and history.src:
-        TransferChain(db).delete_files(Path(history.src))
+        TransferChain().delete_files(Path(history.src))
         # 发送事件
         eventmanager.send_event(
             EventType.DownloadFileDeleted,
diff --git a/app/api/endpoints/login.py b/app/api/endpoints/login.py
index 019fbbb5..d9f99546 100644
--- a/app/api/endpoints/login.py
+++ b/app/api/endpoints/login.py
@@ -35,7 +35,7 @@ async def login_access_token(
     if not user:
         # 请求协助认证
         logger.warn("登录用户本地不匹配，尝试辅助认证 ...")
-        token = UserChain(db).user_authenticate(form_data.username, form_data.password)
+        token = UserChain().user_authenticate(form_data.username, form_data.password)
         if not token:
             raise HTTPException(status_code=401, detail="用户名或密码不正确")
         else:
diff --git a/app/api/endpoints/message.py b/app/api/endpoints/message.py
index 2f979331..6bfb51a6 100644
--- a/app/api/endpoints/message.py
+++ b/app/api/endpoints/message.py
@@ -2,14 +2,12 @@ from typing import Union, Any, List
 
 from fastapi import APIRouter, BackgroundTasks, Depends
 from fastapi import Request
-from sqlalchemy.orm import Session
 from starlette.responses import PlainTextResponse
 
 from app import schemas
 from app.chain.message import MessageChain
 from app.core.config import settings
 from app.core.security import verify_token
-from app.db import get_db
 from app.db.systemconfig_oper import SystemConfigOper
 from app.log import logger
 from app.modules.wechat.WXBizMsgCrypt3 import WXBizMsgCrypt
@@ -19,23 +17,22 @@ from app.schemas.types import SystemConfigKey, NotificationType
 router = APIRouter()
 
 
-def start_message_chain(db: Session, body: Any, form: Any, args: Any):
+def start_message_chain(body: Any, form: Any, args: Any):
     """
     启动链式任务
     """
-    MessageChain(db).process(body=body, form=form, args=args)
+    MessageChain().process(body=body, form=form, args=args)
 
 
 @router.post("/", summary="接收用户消息", response_model=schemas.Response)
-async def user_message(background_tasks: BackgroundTasks, request: Request,
-                       db: Session = Depends(get_db)):
+async def user_message(background_tasks: BackgroundTasks, request: Request):
     """
     用户消息响应
     """
     body = await request.body()
     form = await request.form()
     args = request.query_params
-    background_tasks.add_task(start_message_chain, db, body, form, args)
+    background_tasks.add_task(start_message_chain, body, form, args)
     return schemas.Response(success=True)
 
 
diff --git a/app/api/endpoints/search.py b/app/api/endpoints/search.py
index 35212238..61816d0c 100644
--- a/app/api/endpoints/search.py
+++ b/app/api/endpoints/search.py
@@ -1,25 +1,22 @@
 from typing import List, Any
 
 from fastapi import APIRouter, Depends
-from sqlalchemy.orm import Session
 
 from app import schemas
 from app.chain.douban import DoubanChain
 from app.chain.search import SearchChain
 from app.core.security import verify_token
-from app.db import get_db
 from app.schemas.types import MediaType
 
 router = APIRouter()
 
 
 @router.get("/last", summary="查询搜索结果", response_model=List[schemas.Context])
-async def search_latest(db: Session = Depends(get_db),
-                        _: schemas.TokenPayload = Depends(verify_token)) -> Any:
+async def search_latest(_: schemas.TokenPayload = Depends(verify_token)) -> Any:
     """
     查询搜索结果
     """
-    torrents = SearchChain(db).last_search_results()
+    torrents = SearchChain().last_search_results()
     return [torrent.to_dict() for torrent in torrents]
 
 
@@ -27,7 +24,6 @@ async def search_latest(db: Session = Depends(get_db),
 def search_by_tmdbid(mediaid: str,
                      mtype: str = None,
                      area: str = "title",
-                     db: Session = Depends(get_db),
                      _: schemas.TokenPayload = Depends(verify_token)) -> Any:
     """
     根据TMDBID/豆瓣ID精确搜索站点资源 tmdb:/douban:/
@@ -36,16 +32,16 @@ def search_by_tmdbid(mediaid: str,
         tmdbid = int(mediaid.replace("tmdb:", ""))
         if mtype:
             mtype = MediaType(mtype)
-        torrents = SearchChain(db).search_by_tmdbid(tmdbid=tmdbid, mtype=mtype, area=area)
+        torrents = SearchChain().search_by_tmdbid(tmdbid=tmdbid, mtype=mtype, area=area)
     elif mediaid.startswith("douban:"):
         doubanid = mediaid.replace("douban:", "")
         # 识别豆瓣信息
         context = DoubanChain().recognize_by_doubanid(doubanid)
         if not context or not context.media_info or not context.media_info.tmdb_id:
             return []
-        torrents = SearchChain(db).search_by_tmdbid(tmdbid=context.media_info.tmdb_id,
-                                                    mtype=context.media_info.type,
-                                                    area=area)
+        torrents = SearchChain().search_by_tmdbid(tmdbid=context.media_info.tmdb_id,
+                                                  mtype=context.media_info.type,
+                                                  area=area)
     else:
         return []
     return [torrent.to_dict() for torrent in torrents]
@@ -55,10 +51,9 @@ def search_by_tmdbid(mediaid: str,
 async def search_by_title(keyword: str = None,
                           page: int = 0,
                           site: int = None,
-                          db: Session = Depends(get_db),
                           _: schemas.TokenPayload = Depends(verify_token)) -> Any:
     """
     根据名称模糊搜索站点资源，支持分页，关键词为空是返回首页资源
     """
-    torrents = SearchChain(db).search_by_title(title=keyword, page=page, site=site)
+    torrents = SearchChain().search_by_title(title=keyword, page=page, site=site)
     return [torrent.to_dict() for torrent in torrents]
diff --git a/app/api/endpoints/site.py b/app/api/endpoints/site.py
index ace1f049..38dfc48c 100644
--- a/app/api/endpoints/site.py
+++ b/app/api/endpoints/site.py
@@ -139,9 +139,9 @@ def update_cookie(
             detail=f"站点 {site_id} 不存在！",
         )
     # 更新Cookie
-    state, message = SiteChain(db).update_cookie(site_info=site_info,
-                                                 username=username,
-                                                 password=password)
+    state, message = SiteChain().update_cookie(site_info=site_info,
+                                               username=username,
+                                               password=password)
     return schemas.Response(success=state, message=message)
 
 
@@ -158,7 +158,7 @@ def test_site(site_id: int,
             status_code=404,
             detail=f"站点 {site_id} 不存在",
         )
-    status, message = SiteChain(db).test(site.domain)
+    status, message = SiteChain().test(site.domain)
     return schemas.Response(success=status, message=message)
 
 
diff --git a/app/api/endpoints/subscribe.py b/app/api/endpoints/subscribe.py
index e13ad639..63889972 100644
--- a/app/api/endpoints/subscribe.py
+++ b/app/api/endpoints/subscribe.py
@@ -18,13 +18,13 @@ from app.schemas.types import MediaType
 router = APIRouter()
 
 
-def start_subscribe_add(db: Session, title: str, year: str,
+def start_subscribe_add(title: str, year: str,
                         mtype: MediaType, tmdbid: int, season: int, username: str):
     """
     启动订阅任务
     """
-    SubscribeChain(db).add(title=title, year=year,
-                           mtype=mtype, tmdbid=tmdbid, season=season, username=username)
+    SubscribeChain().add(title=title, year=year,
+                         mtype=mtype, tmdbid=tmdbid, season=season, username=username)
 
 
 @router.get("/", summary="所有订阅", response_model=List[schemas.Subscribe])
@@ -45,7 +45,6 @@ def read_subscribes(
 def create_subscribe(
         *,
         subscribe_in: schemas.Subscribe,
-        db: Session = Depends(get_db),
         current_user: User = Depends(get_current_active_user),
 ) -> Any:
     """
@@ -61,15 +60,15 @@ def create_subscribe(
         title = subscribe_in.name
     else:
         title = None
-    sid, message = SubscribeChain(db).add(mtype=mtype,
-                                          title=title,
-                                          year=subscribe_in.year,
-                                          tmdbid=subscribe_in.tmdbid,
-                                          season=subscribe_in.season,
-                                          doubanid=subscribe_in.doubanid,
-                                          username=current_user.name,
-                                          best_version=subscribe_in.best_version,
-                                          exist_ok=True)
+    sid, message = SubscribeChain().add(mtype=mtype,
+                                        title=title,
+                                        year=subscribe_in.year,
+                                        tmdbid=subscribe_in.tmdbid,
+                                        season=subscribe_in.season,
+                                        doubanid=subscribe_in.doubanid,
+                                        username=current_user.name,
+                                        best_version=subscribe_in.best_version,
+                                        exist_ok=True)
     return schemas.Response(success=True if sid else False, message=message, data={
         "id": sid
     })
@@ -240,7 +239,6 @@ def delete_subscribe(
 
 @router.post("/seerr", summary="OverSeerr/JellySeerr通知订阅", response_model=schemas.Response)
 async def seerr_subscribe(request: Request, background_tasks: BackgroundTasks,
-                          db: Session = Depends(get_db),
                           authorization: str = Header(None)) -> Any:
     """
     Jellyseerr/Overseerr订阅
@@ -268,7 +266,6 @@ async def seerr_subscribe(request: Request, background_tasks: BackgroundTasks,
     # 添加订阅
     if media_type == MediaType.MOVIE:
         background_tasks.add_task(start_subscribe_add,
-                                  db=db,
                                   mtype=media_type,
                                   tmdbid=tmdbId,
                                   title=subject,
@@ -283,7 +280,6 @@ async def seerr_subscribe(request: Request, background_tasks: BackgroundTasks,
                 break
         for season in seasons:
             background_tasks.add_task(start_subscribe_add,
-                                      db=db,
                                       mtype=media_type,
                                       tmdbid=tmdbId,
                                       title=subject,
diff --git a/app/api/endpoints/system.py b/app/api/endpoints/system.py
index 6cea9665..66c815f5 100644
--- a/app/api/endpoints/system.py
+++ b/app/api/endpoints/system.py
@@ -6,13 +6,11 @@ from typing import Union
 import tailer
 from fastapi import APIRouter, HTTPException, Depends
 from fastapi.responses import StreamingResponse
-from sqlalchemy.orm import Session
 
 from app import schemas
 from app.chain.search import SearchChain
 from app.core.config import settings
 from app.core.security import verify_token
-from app.db import get_db
 from app.db.systemconfig_oper import SystemConfigOper
 from app.helper.message import MessageHelper
 from app.helper.progress import ProgressHelper
@@ -174,7 +172,6 @@ def latest_version(_: schemas.TokenPayload = Depends(verify_token)):
 def ruletest(title: str,
              subtitle: str = None,
              ruletype: str = None,
-             db: Session = Depends(get_db),
              _: schemas.TokenPayload = Depends(verify_token)):
     """
     过滤规则测试，规则类型 1-订阅，2-洗版，3-搜索
@@ -193,8 +190,8 @@ def ruletest(title: str,
         return schemas.Response(success=False, message="优先级规则未设置！")
 
     # 过滤
-    result = SearchChain(db).filter_torrents(rule_string=rule_string,
-                                             torrent_list=[torrent])
+    result = SearchChain().filter_torrents(rule_string=rule_string,
+                                           torrent_list=[torrent])
     if not result:
         return schemas.Response(success=False, message="不符合优先级规则！")
     return schemas.Response(success=True, data={
diff --git a/app/api/endpoints/transfer.py b/app/api/endpoints/transfer.py
index 35f9b21b..6c6cf8a1 100644
--- a/app/api/endpoints/transfer.py
+++ b/app/api/endpoints/transfer.py
@@ -59,7 +59,7 @@ def manual_transfer(path: str = None,
         # 目的路径
         if history.dest and str(history.dest) != "None":
             # 删除旧的已整理文件
-            TransferChain(db).delete_files(Path(history.dest))
+            TransferChain().delete_files(Path(history.dest))
             if not target:
                 target = history.dest
     elif path:
@@ -84,7 +84,7 @@ def manual_transfer(path: str = None,
             offset=episode_offset,
         )
     # 开始转移
-    state, errormsg = TransferChain(db).manual_transfer(
+    state, errormsg = TransferChain().manual_transfer(
         in_path=in_path,
         target=target,
         tmdbid=tmdbid,
diff --git a/app/api/servarr.py b/app/api/servarr.py
index 90df22ca..2da902f8 100644
--- a/app/api/servarr.py
+++ b/app/api/servarr.py
@@ -390,11 +390,11 @@ def arr_add_movie(apikey: str,
             "id": subscribe.id
         }
     # 添加订阅
-    sid, message = SubscribeChain(db).add(title=movie.title,
-                                          year=movie.year,
-                                          mtype=MediaType.MOVIE,
-                                          tmdbid=movie.tmdbId,
-                                          userid="Seerr")
+    sid, message = SubscribeChain().add(title=movie.title,
+                                        year=movie.year,
+                                        mtype=MediaType.MOVIE,
+                                        tmdbid=movie.tmdbId,
+                                        userid="Seerr")
     if sid:
         return {
             "id": sid
@@ -582,7 +582,7 @@ def arr_series_lookup(apikey: str, term: str, db: Session = Depends(get_db)) ->
     # 获取TVDBID
     if not term.startswith("tvdb:"):
         mediainfo = MediaChain().recognize_media(meta=MetaInfo(term),
-                                                   mtype=MediaType.TV)
+                                                 mtype=MediaType.TV)
         if not mediainfo:
             return [SonarrSeries()]
         tvdbid = mediainfo.tvdb_id
@@ -606,7 +606,7 @@ def arr_series_lookup(apikey: str, term: str, db: Session = Depends(get_db)) ->
     # 根据TVDB查询媒体信息
     if not mediainfo:
         mediainfo = MediaChain().recognize_media(meta=MetaInfo(tvdbinfo.get('seriesName')),
-                                                   mtype=MediaType.TV)
+                                                 mtype=MediaType.TV)
 
     # 查询是否存在
     exists = MediaChain().media_exists(mediainfo)
@@ -732,12 +732,12 @@ def arr_add_series(apikey: str, tv: schemas.SonarrSeries,
     for season in left_seasons:
         if not season.get("monitored"):
             continue
-        sid, message = SubscribeChain(db).add(title=tv.title,
-                                              year=tv.year,
-                                              season=season.get("seasonNumber"),
-                                              tmdbid=tv.tmdbId,
-                                              mtype=MediaType.TV,
-                                              userid="Seerr")
+        sid, message = SubscribeChain().add(title=tv.title,
+                                            year=tv.year,
+                                            season=season.get("seasonNumber"),
+                                            tmdbid=tv.tmdbId,
+                                            mtype=MediaType.TV,
+                                            userid="Seerr")
 
     if sid:
         return {
diff --git a/app/chain/__init__.py b/app/chain/__init__.py
index ded8ff99..b76912a0 100644
--- a/app/chain/__init__.py
+++ b/app/chain/__init__.py
@@ -7,7 +7,6 @@ from typing import Optional, Any, Tuple, List, Set, Union, Dict
 
 from qbittorrentapi import TorrentFilesList
 from ruamel.yaml import CommentedMap
-from sqlalchemy.orm import Session
 from transmission_rpc import File
 
 from app.core.config import settings
@@ -28,11 +27,10 @@ class ChainBase(metaclass=ABCMeta):
     处理链基类
     """
 
-    def __init__(self, db: Session = None):
+    def __init__(self):
         """
         公共初始化
         """
-        self._db = db
         self.modulemanager = ModuleManager()
         self.eventmanager = EventManager()
 
diff --git a/app/chain/cookiecloud.py b/app/chain/cookiecloud.py
index f1943ab8..5e65848d 100644
--- a/app/chain/cookiecloud.py
+++ b/app/chain/cookiecloud.py
@@ -3,7 +3,6 @@ from typing import Tuple, Optional
 from urllib.parse import urljoin
 
 from lxml import etree
-from sqlalchemy.orm import Session
 
 from app.chain import ChainBase
 from app.chain.site import SiteChain
@@ -25,13 +24,13 @@ class CookieCloudChain(ChainBase):
     CookieCloud处理链
     """
 
-    def __init__(self, db: Session = None):
-        super().__init__(db)
-        self.siteoper = SiteOper(self._db)
-        self.siteiconoper = SiteIconOper(self._db)
+    def __init__(self):
+        super().__init__()
+        self.siteoper = SiteOper()
+        self.siteiconoper = SiteIconOper()
         self.siteshelper = SitesHelper()
         self.rsshelper = RssHelper()
-        self.sitechain = SiteChain(self._db)
+        self.sitechain = SiteChain()
         self.message = MessageHelper()
         self.cookiecloud = CookieCloudHelper(
             server=settings.COOKIECLOUD_HOST,
diff --git a/app/chain/download.py b/app/chain/download.py
index 036b2466..1ef49bea 100644
--- a/app/chain/download.py
+++ b/app/chain/download.py
@@ -5,8 +5,6 @@ import time
 from pathlib import Path
 from typing import List, Optional, Tuple, Set, Dict, Union
 
-from sqlalchemy.orm import Session
-
 from app.chain import ChainBase
 from app.core.config import settings
 from app.core.context import MediaInfo, TorrentInfo, Context
@@ -27,11 +25,11 @@ class DownloadChain(ChainBase):
     下载处理链
     """
 
-    def __init__(self, db: Session = None):
-        super().__init__(db)
+    def __init__(self):
+        super().__init__()
         self.torrent = TorrentHelper()
-        self.downloadhis = DownloadHistoryOper(self._db)
-        self.mediaserver = MediaServerOper(self._db)
+        self.downloadhis = DownloadHistoryOper()
+        self.mediaserver = MediaServerOper()
 
     def post_download_message(self, meta: MetaBase, mediainfo: MediaInfo, torrent: TorrentInfo,
                               channel: MessageChannel = None,
diff --git a/app/chain/mediaserver.py b/app/chain/mediaserver.py
index 0c61b9f3..74235966 100644
--- a/app/chain/mediaserver.py
+++ b/app/chain/mediaserver.py
@@ -1,13 +1,10 @@
 import json
 import threading
-from typing import List, Union, Generator
-
-from sqlalchemy.orm import Session
+from typing import List, Union
 
 from app import schemas
 from app.chain import ChainBase
 from app.core.config import settings
-from app.db import SessionFactory
 from app.db.mediaserver_oper import MediaServerOper
 from app.log import logger
 
@@ -19,8 +16,9 @@ class MediaServerChain(ChainBase):
     媒体服务器处理链
     """
 
-    def __init__(self, db: Session = None):
-        super().__init__(db)
+    def __init__(self):
+        super().__init__()
+        self.dboper = MediaServerOper()
 
     def librarys(self, server: str) -> List[schemas.MediaServerLibrary]:
         """
@@ -51,13 +49,10 @@ class MediaServerChain(ChainBase):
         同步媒体库所有数据到本地数据库
         """
         with lock:
-            # 媒体服务器同步使用独立的会话
-            _db = SessionFactory()
-            _dbOper = MediaServerOper(_db)
             # 汇总统计
             total_count = 0
             # 清空登记薄
-            _dbOper.empty(server=settings.MEDIASERVER)
+            self.dboper.empty(server=settings.MEDIASERVER)
             # 同步黑名单
             sync_blacklist = settings.MEDIASERVER_SYNC_BLACKLIST.split(
                 ",") if settings.MEDIASERVER_SYNC_BLACKLIST else []
@@ -79,6 +74,7 @@ class MediaServerChain(ChainBase):
                             continue
                         if not item.item_id:
                             continue
+                        logger.debug(f"正在同步 {item.title} ...")
                         # 计数
                         library_count += 1
                         seasoninfo = {}
@@ -93,11 +89,8 @@ class MediaServerChain(ChainBase):
                         item_dict = item.dict()
                         item_dict['seasoninfo'] = json.dumps(seasoninfo)
                         item_dict['item_type'] = item_type
-                        _dbOper.add(**item_dict)
+                        self.dboper.add(**item_dict)
                     logger.info(f"{mediaserver} 媒体库 {library.name} 同步完成，共同步数量：{library_count}")
                     # 总数累加
                     total_count += library_count
-            # 关闭数据库连接
-            if _db:
-                _db.close()
             logger.info("【MediaServer】媒体库数据同步完成，同步数量：%s" % total_count)
diff --git a/app/chain/message.py b/app/chain/message.py
index b1fab909..4b915a21 100644
--- a/app/chain/message.py
+++ b/app/chain/message.py
@@ -28,11 +28,11 @@ class MessageChain(ChainBase):
     # 每页数据量
     _page_size: int = 8
 
-    def __init__(self, db: Session = None):
-        super().__init__(db)
-        self.downloadchain = DownloadChain(self._db)
-        self.subscribechain = SubscribeChain(self._db)
-        self.searchchain = SearchChain(self._db)
+    def __init__(self):
+        super().__init__()
+        self.downloadchain = DownloadChain()
+        self.subscribechain = SubscribeChain()
+        self.searchchain = SearchChain()
         self.medtachain = MediaChain()
         self.torrent = TorrentHelper()
         self.eventmanager = EventManager()
diff --git a/app/chain/search.py b/app/chain/search.py
index 67f193a6..301e2ecc 100644
--- a/app/chain/search.py
+++ b/app/chain/search.py
@@ -5,8 +5,6 @@ from datetime import datetime
 from typing import Dict
 from typing import List, Optional
 
-from sqlalchemy.orm import Session
-
 from app.chain import ChainBase
 from app.core.context import Context
 from app.core.context import MediaInfo, TorrentInfo
@@ -26,8 +24,8 @@ class SearchChain(ChainBase):
     站点资源搜索处理链
     """
 
-    def __init__(self, db: Session = None):
-        super().__init__(db)
+    def __init__(self):
+        super().__init__()
         self.siteshelper = SitesHelper()
         self.progress = ProgressHelper()
         self.systemconfig = SystemConfigOper()
diff --git a/app/chain/site.py b/app/chain/site.py
index e2d99356..68bb0b03 100644
--- a/app/chain/site.py
+++ b/app/chain/site.py
@@ -1,8 +1,6 @@
 import re
 from typing import Union, Tuple
 
-from sqlalchemy.orm import Session
-
 from app.chain import ChainBase
 from app.core.config import settings
 from app.db.models.site import Site
@@ -23,9 +21,9 @@ class SiteChain(ChainBase):
     站点管理处理链
     """
 
-    def __init__(self, db: Session = None):
-        super().__init__(db)
-        self.siteoper = SiteOper(self._db)
+    def __init__(self):
+        super().__init__()
+        self.siteoper = SiteOper()
         self.cookiehelper = CookieHelper()
         self.message = MessageHelper()
 
diff --git a/app/chain/subscribe.py b/app/chain/subscribe.py
index 834a7ea4..6c0b9ea0 100644
--- a/app/chain/subscribe.py
+++ b/app/chain/subscribe.py
@@ -3,8 +3,6 @@ import re
 from datetime import datetime
 from typing import Dict, List, Optional, Union, Tuple
 
-from sqlalchemy.orm import Session
-
 from app.chain import ChainBase
 from app.chain.douban import DoubanChain
 from app.chain.download import DownloadChain
@@ -27,11 +25,11 @@ class SubscribeChain(ChainBase):
     订阅管理处理链
     """
 
-    def __init__(self, db: Session = None):
-        super().__init__(db)
-        self.downloadchain = DownloadChain(self._db)
-        self.searchchain = SearchChain(self._db)
-        self.subscribeoper = SubscribeOper(self._db)
+    def __init__(self):
+        super().__init__()
+        self.downloadchain = DownloadChain()
+        self.searchchain = SearchChain()
+        self.subscribeoper = SubscribeOper()
         self.torrentschain = TorrentsChain()
         self.message = MessageHelper()
         self.systemconfig = SystemConfigOper()
diff --git a/app/chain/torrents.py b/app/chain/torrents.py
index b70c4acc..636c4fb9 100644
--- a/app/chain/torrents.py
+++ b/app/chain/torrents.py
@@ -7,7 +7,6 @@ from app.chain import ChainBase
 from app.core.config import settings
 from app.core.context import TorrentInfo, Context, MediaInfo
 from app.core.metainfo import MetaInfo
-from app.db import SessionFactory
 from app.db.site_oper import SiteOper
 from app.db.systemconfig_oper import SystemConfigOper
 from app.helper.rss import RssHelper
@@ -28,10 +27,9 @@ class TorrentsChain(ChainBase, metaclass=Singleton):
     _rss_file = "__rss_cache__"
 
     def __init__(self):
-        self._db = SessionFactory()
-        super().__init__(self._db)
+        super().__init__()
         self.siteshelper = SitesHelper()
-        self.siteoper = SiteOper(self._db)
+        self.siteoper = SiteOper()
         self.rsshelper = RssHelper()
         self.systemconfig = SystemConfigOper()
 
diff --git a/app/chain/transfer.py b/app/chain/transfer.py
index ea688ccd..fac02d58 100644
--- a/app/chain/transfer.py
+++ b/app/chain/transfer.py
@@ -4,8 +4,6 @@ import threading
 from pathlib import Path
 from typing import List, Optional, Tuple, Union, Dict
 
-from sqlalchemy.orm import Session
-
 from app.chain import ChainBase
 from app.chain.media import MediaChain
 from app.chain.tmdb import TmdbChain
@@ -35,10 +33,10 @@ class TransferChain(ChainBase):
     文件转移处理链
     """
 
-    def __init__(self, db: Session = None):
-        super().__init__(db)
-        self.downloadhis = DownloadHistoryOper(self._db)
-        self.transferhis = TransferHistoryOper(self._db)
+    def __init__(self):
+        super().__init__()
+        self.downloadhis = DownloadHistoryOper()
+        self.transferhis = TransferHistoryOper()
         self.progress = ProgressHelper()
         self.mediachain = MediaChain()
         self.tmdbchain = TmdbChain()
diff --git a/app/command.py b/app/command.py
index e3a81e02..cbc02442 100644
--- a/app/command.py
+++ b/app/command.py
@@ -13,7 +13,6 @@ from app.chain.transfer import TransferChain
 from app.core.event import Event as ManagerEvent
 from app.core.event import eventmanager, EventManager
 from app.core.plugin import PluginManager
-from app.db import SessionFactory
 from app.helper.thread import ThreadHelper
 from app.log import logger
 from app.scheduler import Scheduler
@@ -43,14 +42,12 @@ class Command(metaclass=Singleton):
     _event = threading.Event()
 
     def __init__(self):
-        # 数据库连接
-        self._db = SessionFactory()
         # 事件管理器
         self.eventmanager = EventManager()
         # 插件管理器
         self.pluginmanager = PluginManager()
         # 处理链
-        self.chain = CommandChian(self._db)
+        self.chain = CommandChian()
         # 定时服务管理
         self.scheduler = Scheduler()
         # 线程管理器
@@ -64,23 +61,23 @@ class Command(metaclass=Singleton):
                 "category": "站点"
             },
             "/sites": {
-                "func": SiteChain(self._db).remote_list,
+                "func": SiteChain().remote_list,
                 "description": "查询站点",
                 "category": "站点",
                 "data": {}
             },
             "/site_cookie": {
-                "func": SiteChain(self._db).remote_cookie,
+                "func": SiteChain().remote_cookie,
                 "description": "更新站点Cookie",
                 "data": {}
             },
             "/site_enable": {
-                "func": SiteChain(self._db).remote_enable,
+                "func": SiteChain().remote_enable,
                 "description": "启用站点",
                 "data": {}
             },
             "/site_disable": {
-                "func": SiteChain(self._db).remote_disable,
+                "func": SiteChain().remote_disable,
                 "description": "禁用站点",
                 "data": {}
             },
@@ -91,7 +88,7 @@ class Command(metaclass=Singleton):
                 "category": "管理"
             },
             "/subscribes": {
-                "func": SubscribeChain(self._db).remote_list,
+                "func": SubscribeChain().remote_list,
                 "description": "查询订阅",
                 "category": "订阅",
                 "data": {}
@@ -109,7 +106,7 @@ class Command(metaclass=Singleton):
                 "category": "订阅"
             },
             "/subscribe_delete": {
-                "func": SubscribeChain(self._db).remote_delete,
+                "func": SubscribeChain().remote_delete,
                 "description": "删除订阅",
                 "data": {}
             },
@@ -119,7 +116,7 @@ class Command(metaclass=Singleton):
                 "description": "订阅元数据更新"
             },
             "/downloading": {
-                "func": DownloadChain(self._db).remote_downloading,
+                "func": DownloadChain().remote_downloading,
                 "description": "正在下载",
                 "category": "管理",
                 "data": {}
@@ -131,7 +128,7 @@ class Command(metaclass=Singleton):
                 "category": "管理"
             },
             "/redo": {
-                "func": TransferChain(self._db).remote_transfer,
+                "func": TransferChain().remote_transfer,
                 "description": "手动整理",
                 "data": {}
             },
@@ -277,8 +274,6 @@ class Command(metaclass=Singleton):
         """
         self._event.set()
         self._thread.join()
-        if self._db:
-            self._db.close()
 
     def get_commands(self):
         """
diff --git a/app/core/meta/words.py b/app/core/meta/words.py
index c58266a0..81c508e8 100644
--- a/app/core/meta/words.py
+++ b/app/core/meta/words.py
@@ -4,7 +4,6 @@ import cn2an
 import regex as re
 
 from app.db.systemconfig_oper import SystemConfigOper
-from app.log import logger
 from app.schemas.types import SystemConfigKey
 from app.utils.singleton import Singleton
 
diff --git a/app/db/init.py b/app/db/init.py
index d5ee24b5..7b571a2a 100644
--- a/app/db/init.py
+++ b/app/db/init.py
@@ -22,16 +22,15 @@ def init_db():
     # 全量建表
     Base.metadata.create_all(bind=Engine)
     # 初始化超级管理员
-    db = SessionFactory()
-    user = User.get_by_name(db=db, name=settings.SUPERUSER)
-    if not user:
-        user = User(
-            name=settings.SUPERUSER,
-            hashed_password=get_password_hash(settings.SUPERUSER_PASSWORD),
-            is_superuser=True,
-        )
-        user.create(db)
-    db.close()
+    with SessionFactory() as db:
+        user = User.get_by_name(db=db, name=settings.SUPERUSER)
+        if not user:
+            user = User(
+                name=settings.SUPERUSER,
+                hashed_password=get_password_hash(settings.SUPERUSER_PASSWORD),
+                is_superuser=True,
+            )
+            user.create(db)
 
 
 def update_db():
diff --git a/app/db/site_oper.py b/app/db/site_oper.py
index 32acdb4e..1eda3f56 100644
--- a/app/db/site_oper.py
+++ b/app/db/site_oper.py
@@ -31,6 +31,12 @@ class SiteOper(DbOper):
         """
         return Site.list(self._db)
 
+    def list_order_by_pri(self) -> List[Site]:
+        """
+        获取站点列表
+        """
+        return Site.list_order_by_pri(self._db)
+
     def list_active(self) -> List[Site]:
         """
         按状态获取站点列表
diff --git a/app/db/systemconfig_oper.py b/app/db/systemconfig_oper.py
index f4ef206f..40ae04ee 100644
--- a/app/db/systemconfig_oper.py
+++ b/app/db/systemconfig_oper.py
@@ -1,7 +1,7 @@
 import json
 from typing import Any, Union
 
-from app.db import DbOper, SessionFactory
+from app.db import DbOper
 from app.db.models.systemconfig import SystemConfig
 from app.schemas.types import SystemConfigKey
 from app.utils.object import ObjectUtils
@@ -16,8 +16,7 @@ class SystemConfigOper(DbOper, metaclass=Singleton):
         """
         加载配置到内存
         """
-        self._db = SessionFactory()
-        super().__init__(self._db)
+        super().__init__()
         for item in SystemConfig.list(self._db):
             if ObjectUtils.is_obj(item.value):
                 self.__SYSTEMCONF[item.key] = json.loads(item.value)
diff --git a/app/helper/sites.cp311-win_amd64.pyd b/app/helper/sites.cp311-win_amd64.pyd
index 9595132b..4fde44a6 100644
Binary files a/app/helper/sites.cp311-win_amd64.pyd and b/app/helper/sites.cp311-win_amd64.pyd differ
diff --git a/app/helper/sites.cpython-311-aarch64-linux-gnu.so b/app/helper/sites.cpython-311-aarch64-linux-gnu.so
index e74af908..f45abdcc 100644
Binary files a/app/helper/sites.cpython-311-aarch64-linux-gnu.so and b/app/helper/sites.cpython-311-aarch64-linux-gnu.so differ
diff --git a/app/helper/sites.cpython-311-darwin.so b/app/helper/sites.cpython-311-darwin.so
index e3c18626..b605bdc0 100755
Binary files a/app/helper/sites.cpython-311-darwin.so and b/app/helper/sites.cpython-311-darwin.so differ
diff --git a/app/helper/sites.cpython-311-x86_64-linux-gnu.so b/app/helper/sites.cpython-311-x86_64-linux-gnu.so
index 4ea51b16..23e99174 100644
Binary files a/app/helper/sites.cpython-311-x86_64-linux-gnu.so and b/app/helper/sites.cpython-311-x86_64-linux-gnu.so differ
diff --git a/app/plugins/__init__.py b/app/plugins/__init__.py
index 928eb056..33feb4a6 100644
--- a/app/plugins/__init__.py
+++ b/app/plugins/__init__.py
@@ -5,7 +5,6 @@ from typing import Any, List, Dict, Tuple
 from app.chain import ChainBase
 from app.core.config import settings
 from app.core.event import EventManager
-from app.db import SessionFactory
 from app.db.models import Base
 from app.db.plugindata_oper import PluginDataOper
 from app.db.systemconfig_oper import SystemConfigOper
@@ -36,12 +35,10 @@ class _PluginBase(metaclass=ABCMeta):
     plugin_desc: str = ""
 
     def __init__(self):
-        # 数据库连接
-        self.db = SessionFactory()
         # 插件数据
-        self.plugindata = PluginDataOper(self.db)
+        self.plugindata = PluginDataOper()
         # 处理链
-        self.chain = PluginChian(self.db)
+        self.chain = PluginChian()
         # 系统配置
         self.systemconfig = SystemConfigOper()
         # 系统消息
@@ -186,8 +183,4 @@ class _PluginBase(metaclass=ABCMeta):
         ))
 
     def close(self):
-        """
-        关闭数据库连接
-        """
-        if self.db:
-            self.db.close()
+        pass
diff --git a/app/plugins/autoclean/__init__.py b/app/plugins/autoclean/__init__.py
index 842b7ab5..ed727107 100644
--- a/app/plugins/autoclean/__init__.py
+++ b/app/plugins/autoclean/__init__.py
@@ -72,8 +72,8 @@ class AutoClean(_PluginBase):
 
             # 加载模块
         if self._enabled:
-            self._downloadhis = DownloadHistoryOper(self.db)
-            self._transferhis = TransferHistoryOper(self.db)
+            self._downloadhis = DownloadHistoryOper()
+            self._transferhis = TransferHistoryOper()
             # 定时服务
             self._scheduler = BackgroundScheduler(timezone=settings.TZ)
 
@@ -181,12 +181,12 @@ class AutoClean(_PluginBase):
                 for history in transferhis_list:
                     # 册除媒体库文件
                     if str(self._cleantype == "dest") or str(self._cleantype == "all"):
-                        TransferChain(self.db).delete_files(Path(history.dest))
+                        TransferChain().delete_files(Path(history.dest))
                         # 删除记录
                         self._transferhis.delete(history.id)
                     # 删除源文件
                     if str(self._cleantype == "src") or str(self._cleantype == "all"):
-                        TransferChain(self.db).delete_files(Path(history.src))
+                        TransferChain().delete_files(Path(history.src))
                         # 发送事件
                         eventmanager.send_event(
                             EventType.DownloadFileDeleted,
diff --git a/app/plugins/autosignin/__init__.py b/app/plugins/autosignin/__init__.py
index 67c2d1e9..5ef68b51 100644
--- a/app/plugins/autosignin/__init__.py
+++ b/app/plugins/autosignin/__init__.py
@@ -15,6 +15,7 @@ from app import schemas
 from app.core.config import settings
 from app.core.event import EventManager, eventmanager, Event
 from app.db.models.site import Site
+from app.db.site_oper import SiteOper
 from app.helper.browser import PlaywrightHelper
 from app.helper.cloudflare import under_challenge
 from app.helper.module import ModuleHelper
@@ -52,6 +53,7 @@ class AutoSignIn(_PluginBase):
 
     # 私有属性
     sites: SitesHelper = None
+    siteoper: SiteOper = None
     # 事件管理器
     event: EventManager = None
     # 定时器
@@ -74,6 +76,7 @@ class AutoSignIn(_PluginBase):
 
     def init_plugin(self, config: dict = None):
         self.sites = SitesHelper()
+        self.siteoper = SiteOper()
         self.event = EventManager()
 
         # 停止现有任务
@@ -248,7 +251,7 @@ class AutoSignIn(_PluginBase):
         customSites = self.__custom_sites()
 
         site_options = ([{"title": site.name, "value": site.id}
-                         for site in Site.list_order_by_pri(self.db)]
+                         for site in self.siteoper.list_order_by_pri()]
                         + [{"title": site.get("name"), "value": site.get("id")}
                            for site in customSites])
         return [
@@ -456,7 +459,7 @@ class AutoSignIn(_PluginBase):
             "retry_keyword": "错误|失败"
         }
 
-    def __custom_sites(self) -> List[dict]:
+    def __custom_sites(self) -> List[Any]:
         custom_sites = []
         custom_sites_config = self.get_config("CustomSites")
         if custom_sites_config and custom_sites_config.get("enabled"):
diff --git a/app/plugins/bestfilmversion/__init__.py b/app/plugins/bestfilmversion/__init__.py
index 9d78cb4a..28dc95f3 100644
--- a/app/plugins/bestfilmversion/__init__.py
+++ b/app/plugins/bestfilmversion/__init__.py
@@ -62,7 +62,7 @@ class BestFilmVersion(_PluginBase):
 
     def init_plugin(self, config: dict = None):
         self._cache_path = settings.TEMP_PATH / "__best_film_version_cache__"
-        self.subscribechain = SubscribeChain(self.db)
+        self.subscribechain = SubscribeChain()
 
         # 停止现有任务
         self.stop_service()
diff --git a/app/plugins/dirmonitor/__init__.py b/app/plugins/dirmonitor/__init__.py
index 18f83b57..3e953252 100644
--- a/app/plugins/dirmonitor/__init__.py
+++ b/app/plugins/dirmonitor/__init__.py
@@ -96,9 +96,9 @@ class DirMonitor(_PluginBase):
     _event = threading.Event()
 
     def init_plugin(self, config: dict = None):
-        self.transferhis = TransferHistoryOper(self.db)
-        self.downloadhis = DownloadHistoryOper(self.db)
-        self.transferchian = TransferChain(self.db)
+        self.transferhis = TransferHistoryOper()
+        self.downloadhis = DownloadHistoryOper()
+        self.transferchian = TransferChain()
         self.tmdbchain = TmdbChain()
         # 清空配置
         self._dirconf = {}
diff --git a/app/plugins/doubanrank/__init__.py b/app/plugins/doubanrank/__init__.py
index f476d047..0a31557e 100644
--- a/app/plugins/doubanrank/__init__.py
+++ b/app/plugins/doubanrank/__init__.py
@@ -66,8 +66,8 @@ class DoubanRank(_PluginBase):
     _clearflag = False
 
     def init_plugin(self, config: dict = None):
-        self.downloadchain = DownloadChain(self.db)
-        self.subscribechain = SubscribeChain(self.db)
+        self.downloadchain = DownloadChain()
+        self.subscribechain = SubscribeChain()
 
         if config:
             self._enabled = config.get("enabled")
diff --git a/app/plugins/doubansync/__init__.py b/app/plugins/doubansync/__init__.py
index 7f370699..f42a3318 100644
--- a/app/plugins/doubansync/__init__.py
+++ b/app/plugins/doubansync/__init__.py
@@ -66,9 +66,9 @@ class DoubanSync(_PluginBase):
 
     def init_plugin(self, config: dict = None):
         self.rsshelper = RssHelper()
-        self.downloadchain = DownloadChain(self.db)
-        self.searchchain = SearchChain(self.db)
-        self.subscribechain = SubscribeChain(self.db)
+        self.downloadchain = DownloadChain()
+        self.searchchain = SearchChain()
+        self.subscribechain = SubscribeChain()
 
         # 停止现有任务
         self.stop_service()
diff --git a/app/plugins/downloadingmsg/__init__.py b/app/plugins/downloadingmsg/__init__.py
index f72ab6ad..30af4156 100644
--- a/app/plugins/downloadingmsg/__init__.py
+++ b/app/plugins/downloadingmsg/__init__.py
@@ -57,7 +57,7 @@ class DownloadingMsg(_PluginBase):
 
             # 加载模块
         if self._enabled:
-            self._downloadhis = DownloadHistoryOper(self.db)
+            self._downloadhis = DownloadHistoryOper()
             # 定时服务
             self._scheduler = BackgroundScheduler(timezone=settings.TZ)
 
@@ -80,7 +80,7 @@ class DownloadingMsg(_PluginBase):
         定时推送正在下载进度
         """
         # 正在下载种子
-        torrents = DownloadChain(self.db).list_torrents(status=TorrentStatus.DOWNLOADING)
+        torrents = DownloadChain().list_torrents(status=TorrentStatus.DOWNLOADING)
         if not torrents:
             logger.info("当前没有正在下载的任务！")
             return
diff --git a/app/plugins/iyuuautoseed/__init__.py b/app/plugins/iyuuautoseed/__init__.py
index 9e5ff84f..71c0f646 100644
--- a/app/plugins/iyuuautoseed/__init__.py
+++ b/app/plugins/iyuuautoseed/__init__.py
@@ -11,6 +11,7 @@ from lxml import etree
 from ruamel.yaml import CommentedMap
 
 from app.core.config import settings
+from app.db.site_oper import SiteOper
 from app.helper.sites import SitesHelper
 
 from app.core.event import eventmanager
@@ -55,6 +56,7 @@ class IYUUAutoSeed(_PluginBase):
     qb = None
     tr = None
     sites = None
+    siteoper = None
     torrent = None
     # 开关
     _enabled = False
@@ -96,6 +98,7 @@ class IYUUAutoSeed(_PluginBase):
 
     def init_plugin(self, config: dict = None):
         self.sites = SitesHelper()
+        self.siteoper = SiteOper()
         self.torrent = TorrentHelper()
         # 读取配置
         if config:
@@ -176,7 +179,7 @@ class IYUUAutoSeed(_PluginBase):
         """
         # 站点的可选项
         site_options = [{"title": site.name, "value": site.id}
-                        for site in Site.list_order_by_pri(self.db)]
+                        for site in self.siteoper.list_order_by_pri()]
         return [
             {
                 'component': 'VForm',
diff --git a/app/plugins/libraryscraper/__init__.py b/app/plugins/libraryscraper/__init__.py
index 00beb143..c123f35d 100644
--- a/app/plugins/libraryscraper/__init__.py
+++ b/app/plugins/libraryscraper/__init__.py
@@ -70,7 +70,7 @@ class LibraryScraper(_PluginBase):
 
         # 启动定时任务 & 立即运行一次
         if self._enabled or self._onlyonce:
-            self.transferhis = TransferHistoryOper(self.db)
+            self.transferhis = TransferHistoryOper()
             self._scheduler = BackgroundScheduler(timezone=settings.TZ)
             if self._cron:
                 logger.info(f"媒体库刮削服务启动，周期：{self._cron}")
diff --git a/app/plugins/mediasyncdel/__init__.py b/app/plugins/mediasyncdel/__init__.py
index 5127d704..f10b0dc5 100644
--- a/app/plugins/mediasyncdel/__init__.py
+++ b/app/plugins/mediasyncdel/__init__.py
@@ -62,7 +62,7 @@ class MediaSyncDel(_PluginBase):
     tr = None
 
     def init_plugin(self, config: dict = None):
-        self._transferchain = TransferChain(self.db)
+        self._transferchain = TransferChain()
         self._transferhis = self._transferchain.transferhis
         self._downloadhis = self._transferchain.downloadhis
         self.episode = Episode()
diff --git a/app/plugins/nastoolsync/__init__.py b/app/plugins/nastoolsync/__init__.py
index 32253fe0..aa294724 100644
--- a/app/plugins/nastoolsync/__init__.py
+++ b/app/plugins/nastoolsync/__init__.py
@@ -46,9 +46,9 @@ class NAStoolSync(_PluginBase):
     _transfer = False
 
     def init_plugin(self, config: dict = None):
-        self._transferhistory = TransferHistoryOper(self.db)
-        self._plugindata = PluginDataOper(self.db)
-        self._downloadhistory = DownloadHistoryOper(self.db)
+        self._transferhistory = TransferHistoryOper()
+        self._plugindata = PluginDataOper()
+        self._downloadhistory = DownloadHistoryOper()
 
         if config:
             self._clear = config.get("clear")
diff --git a/app/plugins/personmeta/__init__.py b/app/plugins/personmeta/__init__.py
index ed78e42d..bcc626b6 100644
--- a/app/plugins/personmeta/__init__.py
+++ b/app/plugins/personmeta/__init__.py
@@ -69,7 +69,7 @@ class PersonMeta(_PluginBase):
 
     def init_plugin(self, config: dict = None):
         self.tmdbchain = TmdbChain()
-        self.mschain = MediaServerChain(self.db)
+        self.mschain = MediaServerChain()
         if config:
             self._enabled = config.get("enabled")
             self._onlyonce = config.get("onlyonce")
diff --git a/app/plugins/rsssubscribe/__init__.py b/app/plugins/rsssubscribe/__init__.py
index 54afeadc..3fe87d01 100644
--- a/app/plugins/rsssubscribe/__init__.py
+++ b/app/plugins/rsssubscribe/__init__.py
@@ -69,9 +69,9 @@ class RssSubscribe(_PluginBase):
 
     def init_plugin(self, config: dict = None):
         self.rsshelper = RssHelper()
-        self.downloadchain = DownloadChain(self.db)
-        self.searchchain = SearchChain(self.db)
-        self.subscribechain = SubscribeChain(self.db)
+        self.downloadchain = DownloadChain()
+        self.searchchain = SearchChain()
+        self.subscribechain = SubscribeChain()
 
         # 停止现有任务
         self.stop_service()
diff --git a/app/plugins/sitestatistic/__init__.py b/app/plugins/sitestatistic/__init__.py
index 4ef5333a..366bd9d1 100644
--- a/app/plugins/sitestatistic/__init__.py
+++ b/app/plugins/sitestatistic/__init__.py
@@ -16,6 +16,7 @@ from app.core.config import settings
 from app.core.event import Event
 from app.core.event import eventmanager
 from app.db.models.site import Site
+from app.db.site_oper import SiteOper
 from app.helper.browser import PlaywrightHelper
 from app.helper.module import ModuleHelper
 from app.helper.sites import SitesHelper
@@ -56,6 +57,7 @@ class SiteStatistic(_PluginBase):
 
     # 私有属性
     sites = None
+    siteoper = None
     _scheduler: Optional[BackgroundScheduler] = None
     _last_update_time: Optional[datetime] = None
     _sites_data: dict = {}
@@ -72,6 +74,7 @@ class SiteStatistic(_PluginBase):
 
     def init_plugin(self, config: dict = None):
         self.sites = SitesHelper()
+        self.siteoper = SiteOper()
         # 停止现有任务
         self.stop_service()
 
@@ -187,7 +190,7 @@ class SiteStatistic(_PluginBase):
         customSites = self.__custom_sites()
 
         site_options = ([{"title": site.name, "value": site.id}
-                        for site in Site.list_order_by_pri(self.db)]
+                        for site in self.siteoper.list_order_by_pri()]
                         + [{"title": site.get("name"), "value": site.get("id")}
                            for site in customSites])
 
@@ -1122,7 +1125,7 @@ class SiteStatistic(_PluginBase):
             self.save_data("last_update_time", key)
             logger.info("站点数据刷新完成")
 
-    def __custom_sites(self) -> List[dict]:
+    def __custom_sites(self) -> List[Any]:
         custom_sites = []
         custom_sites_config = self.get_config("CustomSites")
         if custom_sites_config and custom_sites_config.get("enabled"):
diff --git a/app/plugins/syncdownloadfiles/__init__.py b/app/plugins/syncdownloadfiles/__init__.py
index db4ee120..aec3b3f8 100644
--- a/app/plugins/syncdownloadfiles/__init__.py
+++ b/app/plugins/syncdownloadfiles/__init__.py
@@ -59,8 +59,8 @@ class SyncDownloadFiles(_PluginBase):
 
         self.qb = Qbittorrent()
         self.tr = Transmission()
-        self.downloadhis = DownloadHistoryOper(self.db)
-        self.transferhis = TransferHistoryOper(self.db)
+        self.downloadhis = DownloadHistoryOper()
+        self.transferhis = TransferHistoryOper()
 
         if config:
             self._enabled = config.get('enabled')
diff --git a/app/scheduler.py b/app/scheduler.py
index 6c01e914..97885f5f 100644
--- a/app/scheduler.py
+++ b/app/scheduler.py
@@ -15,7 +15,6 @@ from app.chain.subscribe import SubscribeChain
 from app.chain.tmdb import TmdbChain
 from app.chain.transfer import TransferChain
 from app.core.config import settings
-from app.db import SessionFactory
 from app.log import logger
 from app.utils.singleton import Singleton
 from app.utils.timer import TimerUtils
@@ -44,32 +43,30 @@ class Scheduler(metaclass=Singleton):
     _event = threading.Event()
 
     def __init__(self):
-        # 数据库连接
-        self._db = SessionFactory()
         # 各服务的运行状态
         self._jobs = {
             "cookiecloud": {
-                "func": CookieCloudChain(self._db).process,
+                "func": CookieCloudChain().process,
                 "running": False,
             },
             "mediaserver_sync": {
-                "func": MediaServerChain(self._db).sync,
+                "func": MediaServerChain().sync,
                 "running": False,
             },
             "subscribe_tmdb": {
-                "func": SubscribeChain(self._db).check,
+                "func": SubscribeChain().check,
                 "running": False,
             },
             "subscribe_search": {
-                "func": SubscribeChain(self._db).search,
+                "func": SubscribeChain().search,
                 "running": False,
             },
             "subscribe_refresh": {
-                "func": SubscribeChain(self._db).refresh,
+                "func": SubscribeChain().refresh,
                 "running": False,
             },
             "transfer": {
-                "func": TransferChain(self._db).process,
+                "func": TransferChain().process,
                 "running": False,
             }
         }
@@ -189,7 +186,7 @@ class Scheduler(metaclass=Singleton):
 
         # 后台刷新TMDB壁纸
         self._scheduler.add_job(
-            TmdbChain(self._db).get_random_wallpager,
+            TmdbChain().get_random_wallpager,
             "interval",
             minutes=30,
             next_run_time=datetime.now(pytz.timezone(settings.TZ)) + timedelta(seconds=3)
@@ -197,7 +194,7 @@ class Scheduler(metaclass=Singleton):
 
         # 公共定时服务
         self._scheduler.add_job(
-            SchedulerChain(self._db).scheduler_job,
+            SchedulerChain().scheduler_job,
             "interval",
             minutes=10
         )
@@ -264,5 +261,3 @@ class Scheduler(metaclass=Singleton):
         self._event.set()
         if self._scheduler.running:
             self._scheduler.shutdown()
-        if self._db:
-            self._db.close()
diff --git a/database/versions/232dfa044617_1_0_6.py b/database/versions/232dfa044617_1_0_6.py
index 2cd3dfb3..fe9f0ac1 100644
--- a/database/versions/232dfa044617_1_0_6.py
+++ b/database/versions/232dfa044617_1_0_6.py
@@ -6,8 +6,6 @@ Create Date: 2023-09-19 21:34:41.994617
 
 """
 from alembic import op
-import sqlalchemy as sa
-
 
 # revision identifiers, used by Alembic.
 revision = '232dfa044617'
diff --git a/database/versions/30329639c12b_1_0_7.py b/database/versions/30329639c12b_1_0_7.py
index 6268daf3..7006ec9e 100644
--- a/database/versions/30329639c12b_1_0_7.py
+++ b/database/versions/30329639c12b_1_0_7.py
@@ -6,8 +6,6 @@ Create Date: 2023-09-23 08:25:59.776488
 
 """
 from alembic import op
-import sqlalchemy as sa
-
 
 # revision identifiers, used by Alembic.
 revision = '30329639c12b'
diff --git a/database/versions/b2f011d3a8b7_1_0_8.py b/database/versions/b2f011d3a8b7_1_0_8.py
index 9f7373e4..37a36415 100644
--- a/database/versions/b2f011d3a8b7_1_0_8.py
+++ b/database/versions/b2f011d3a8b7_1_0_8.py
@@ -8,7 +8,6 @@ Create Date: 2023-09-28 10:15:58.410003
 from alembic import op
 import sqlalchemy as sa
 
-
 # revision identifiers, used by Alembic.
 revision = 'b2f011d3a8b7'
 down_revision = '30329639c12b'
@@ -25,5 +24,6 @@ def upgrade() -> None:
         pass
     # ### end Alembic commands ###
 
+
 def downgrade() -> None:
-    pass
\ No newline at end of file
+    pass