diff --git a/app/chain/message.py b/app/chain/message.py
index a47700d0..a51341d8 100644
--- a/app/chain/message.py
+++ b/app/chain/message.py
@@ -130,6 +130,14 @@ class MessageChain(ChainBase):
             elif cache_type == "Subscribe":
                 # 订阅媒体
                 mediainfo: MediaInfo = cache_list[int(text) - 1]
+                # 查询缺失的媒体信息
+                exist_flag, _ = self.downloadchain.get_no_exists_info(meta=self._current_meta,
+                                                                      mediainfo=self._current_media)
+                if exist_flag:
+                    self.post_message(title=f"{self._current_media.title_year}"
+                                            f"{self._current_meta.sea} 媒体库中已存在",
+                                      userid=userid)
+                    return
                 self.subscribechain.add(title=mediainfo.title,
                                         year=mediainfo.year,
                                         mtype=mediainfo.type,