diff --git a/app/db/__init__.py b/app/db/__init__.py
index a959b0ae..dda252a2 100644
--- a/app/db/__init__.py
+++ b/app/db/__init__.py
@@ -1,8 +1,13 @@
+import threading
+
 from sqlalchemy import create_engine, QueuePool
 from sqlalchemy.orm import sessionmaker, Session, scoped_session
 
 from app.core.config import settings
 
+# 数据库锁
+DBLock = threading.Lock()
+
 # 数据库引擎
 Engine = create_engine(f"sqlite:///{settings.CONFIG_PATH}/user.db",
                        pool_pre_ping=True,
@@ -44,4 +49,5 @@ class DbOper:
         if db:
             self._db = db
         else:
-            self._db = ScopedSession()
+            with DBLock:
+                self._db = ScopedSession()
diff --git a/app/db/models/__init__.py b/app/db/models/__init__.py
index 0bd8154c..94daa022 100644
--- a/app/db/models/__init__.py
+++ b/app/db/models/__init__.py
@@ -3,10 +3,7 @@ from typing import Any, Self, List
 
 from sqlalchemy.orm import as_declarative, declared_attr, Session
 
-from app.db import ScopedSession
-
-# 数据库锁
-DBLock = threading.Lock()
+from app.db import ScopedSession, DBLock
 
 
 def db_persist(func):