diff --git a/backend/app/admin/service/auth_service.py b/backend/app/admin/service/auth_service.py
index a74b783c..a55a0094 100644
--- a/backend/app/admin/service/auth_service.py
+++ b/backend/app/admin/service/auth_service.py
@@ -146,7 +146,6 @@ class AuthService:
                 log.error('登陆错误: 用户密码有误')
             task = BackgroundTask(
                 login_log_service.create,
-                db=db,
                 user_uuid=user.uuid if user else uuid4_str(),
                 username=obj.username,
                 login_time=timezone.now(),
@@ -160,7 +159,6 @@ class AuthService:
         else:
             background_tasks.add_task(
                 login_log_service.create,
-                db=db,
                 user_uuid=user.uuid,
                 username=obj.username,
                 login_time=timezone.now(),
diff --git a/backend/app/admin/service/login_log_service.py b/backend/app/admin/service/login_log_service.py
index 21db54d3..5aad1c66 100644
--- a/backend/app/admin/service/login_log_service.py
+++ b/backend/app/admin/service/login_log_service.py
@@ -8,6 +8,7 @@ from backend.app.admin.schema.login_log import CreateLoginLogParam, DeleteLoginL
 from backend.common.context import ctx
 from backend.common.log import log
 from backend.common.pagination import paging_data
+from backend.database.db import async_db_session
 
 
 class LoginLogService:
@@ -30,7 +31,6 @@ class LoginLogService:
     @staticmethod
     async def create(
         *,
-        db: AsyncSession,
         user_uuid: str,
         username: str,
         login_time: datetime,
@@ -40,7 +40,6 @@ class LoginLogService:
         """
         创建登录日志
 
-        :param db: 数据库会话
         :param user_uuid: 用户 UUID
         :param username: 用户名
         :param login_time: 登录时间
@@ -64,7 +63,9 @@ class LoginLogService:
                 msg=msg,
                 login_time=login_time,
             )
-            await login_log_dao.create(db, obj)
+            # 为后台任务创建独立数据库会话
+            async with async_db_session.begin() as db:
+                await login_log_dao.create(db, obj)
         except Exception as e:
             log.error(f'登录日志创建失败: {e}')
 
diff --git a/backend/plugin/oauth2/service/oauth2_service.py b/backend/plugin/oauth2/service/oauth2_service.py
index a13b475f..b80be327 100644
--- a/backend/plugin/oauth2/service/oauth2_service.py
+++ b/backend/plugin/oauth2/service/oauth2_service.py
@@ -107,7 +107,6 @@ class OAuth2Service:
         await db.refresh(sys_user)
         background_tasks.add_task(
             login_log_service.create,
-            db=db,
             user_uuid=sys_user.uuid,
             username=sys_user.username,
             login_time=timezone.now(),