diff --git a/backend/app/services/search_engine.py b/backend/app/services/search_engine.py
index e3c72ec..6bdefff 100644
--- a/backend/app/services/search_engine.py
+++ b/backend/app/services/search_engine.py
@@ -507,8 +507,8 @@ class AdvancedSearchEngine:
                 children = (await db.execute(select(GlobalTag.id).where(or_(*child_conds)))).scalars().all()
                 all_tag_ids.update(children)
             uids = list(all_tag_ids)
-            from sqlalchemy.dialects.postgresql import array as _pg_array
-            conditions.append(GlobalLiterature.tag_ids.overlap(_pg_array(uids)))
+            from sqlalchemy.dialects.postgresql import array as _pg_array, UUID as _pg_uuid
+            conditions.append(GlobalLiterature.tag_ids.overlap(_pg_array(uids, type_=_pg_uuid())))
 
         # 发表类型（PG JSONB contains）
         if pub_types: