diff --git a/inventory-backend/app/services/auth_service.py b/inventory-backend/app/services/auth_service.py
index 4dc8c31..33be58e 100644
--- a/inventory-backend/app/services/auth_service.py
+++ b/inventory-backend/app/services/auth_service.py
@@ -3,7 +3,7 @@ from app.models.system import SysUser
 from app.extensions import db
 from flask_jwt_extended import create_access_token
 from app.utils.constants import UserRole
-
+from datetime import timedelta  # [修改点1] 引入 timedelta 用于设置过期时间
 
 class AuthService:
     # 硬编码的超级管理员凭证
@@ -50,9 +50,11 @@ class AuthService:
             user_info = user.to_dict()
 
         # 3. 生成 Token
+        # [修改点2] 增加 expires_delta 参数，设置为 7 天（可根据需要修改为 days=1 或 days=30）
         access_token = create_access_token(
             identity=user_id,
-            additional_claims={'role': user_role, 'username': username}
+            additional_claims={'role': user_role, 'username': username},
+            expires_delta=timedelta(days=7)
         )
 
         return {