diff --git a/admin.py b/admin.py
index f7a6ef8..7de51e8 100644
--- a/admin.py
+++ b/admin.py
@@ -341,14 +341,14 @@ def save_site_settings():
     """保存网站基础配置"""
     data = request.json
     
-    # 保存每个配置项
+    # 保存每个配置项（key 直接使用，不带 site_ 前缀）
     for key, value in data.items():
         if key in ['max_file_size', 'cache_expire_days']:
-            DynamicConfig.set(f'site_{key}', int(value), category='site', value_type='int', user_id=session.get('user_id'))
+            DynamicConfig.set(key, int(value), category='site', value_type='int', user_id=session.get('user_id'))
         elif key in ['enable_email_notify', 'enable_cache', 'enable_guest']:
-            DynamicConfig.set(f'site_{key}', bool(value), category='site', value_type='bool', user_id=session.get('user_id'))
+            DynamicConfig.set(key, bool(value), category='site', value_type='bool', user_id=session.get('user_id'))
         else:
-            DynamicConfig.set(f'site_{key}', value, category='site', user_id=session.get('user_id'))
+            DynamicConfig.set(key, value, category='site', user_id=session.get('user_id'))
     
     # 记录日志
     log = OperationLog(