diff --git a/backend/api/chat_file.py b/backend/api/chat_file.py
index 5731284..0c51953 100644
--- a/backend/api/chat_file.py
+++ b/backend/api/chat_file.py
@@ -486,7 +486,6 @@ async def upload_chat_file(
         # 🔑 图片审核：在创建文件记录前进行审核
         if file_type in ['png', 'jpg', 'jpeg', 'bmp']:
             from core.dependencies import get_moderation_service
-            from core.config import settings
             from core.exceptions import ModerationError
             from models.moderation import ModerationDecision
             
diff --git a/backend/api/kb_file_router.py b/backend/api/kb_file_router.py
index f682ba8..0d7918e 100644
--- a/backend/api/kb_file_router.py
+++ b/backend/api/kb_file_router.py
@@ -395,7 +395,6 @@ async def upload_file(
                 # 🔑 图片审核：在创建文件记录前进行审核
                 if file_type in ['png', 'jpg', 'jpeg', 'bmp']:
                     from core.dependencies import get_moderation_service
-                    from core.config import settings
                     from core.exceptions import ModerationError
                     from models.moderation import ModerationDecision