diff --git a/core/routers/chat/routes.py b/core/routers/chat/routes.py
index 40a7c54..8091635 100644
--- a/core/routers/chat/routes.py
+++ b/core/routers/chat/routes.py
@@ -10,9 +10,9 @@ from json.decoder import JSONDecodeError
 
 from fastapi import APIRouter, Query, Depends, WebSocket, WebSocketDisconnect, HTTPException, status
 from fastapi_limiter.depends import WebSocketRateLimiter
-from sqlalchemy import select, func, and_, exists, distinct
+from sqlalchemy import select, func, and_, exists, update
 from sqlalchemy.ext.asyncio import AsyncSession
-from sqlalchemy.orm import selectinload, aliased
+from sqlalchemy.orm import selectinload
 
 from core.base import schema as base_schema
 from core.db.crud import CRUD
@@ -208,11 +208,23 @@ async def delete_single_chat(
         login_user: LoginUser = Depends(get_current_user_form_http),
         db_session: AsyncSession = Depends(get_async_session),
 ):
-    chat = await CRUD(db_session, Chat).update(
-        data={'is_deleted': True},
-        filters={'chat_guid': chat_guid, 'user_id': login_user.user_id}
+    subquery = (
+        select(chat_participant.c.chat_id)
+        .where(chat_participant.c.user_id == login_user.user_id)
+    ).scalar_subquery()
+
+    query = (
+        update(Chat)
+        .where(and_(
+            Chat.id.in_(subquery),
+            Chat.guid == chat_guid
+        ))
+        .values(is_deleted=True)
     )
-    if chat is None:
+    result = await db_session.execute(query)
+    await db_session.commit()
+
+    if result.rowcount == 0:
         raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail='聊天不存在')
 
     return {'message': '聊天已删除'}