diff --git a/backend/app/api/v1/system_settings.py b/backend/app/api/v1/system_settings.py
index 870771b..c5aad94 100644
--- a/backend/app/api/v1/system_settings.py
+++ b/backend/app/api/v1/system_settings.py
@@ -168,22 +168,41 @@ async def set_feature_switch(db: AsyncSession, tenant_id: int, feature_code: str
         )
         default_row = result.fetchone()
         
+        # 定义功能开关默认值映射
+        FEATURE_DEFAULTS = {
+            'employee_sync': ('员工同步', 'system', '从钉钉同步员工信息'),
+            'dingtalk_login': ('钉钉免密登录', 'system', '允许通过钉钉免密登录'),
+            'ai_practice': ('AI 对练', 'feature', 'AI 对练功能'),
+            'dual_practice': ('双人对练', 'feature', '双人对练功能'),
+        }
+        
         if default_row:
-            # 插入租户级配置
-            await db.execute(
-                text("""
-                    INSERT INTO feature_switches (tenant_id, feature_code, feature_name, feature_group, is_enabled, description)
-                    VALUES (:tenant_id, :feature_code, :feature_name, :feature_group, :is_enabled, :description)
-                """),
-                {
-                    "tenant_id": tenant_id,
-                    "feature_code": feature_code,
-                    "feature_name": default_row[0],
-                    "feature_group": default_row[1],
-                    "is_enabled": 1 if is_enabled else 0,
-                    "description": default_row[2]
-                }
-            )
+            feature_name = default_row[0]
+            feature_group = default_row[1]
+            description = default_row[2]
+        elif feature_code in FEATURE_DEFAULTS:
+            feature_name, feature_group, description = FEATURE_DEFAULTS[feature_code]
+        else:
+            # 未知功能码，使用默认值
+            feature_name = feature_code
+            feature_group = 'system'
+            description = f'{feature_code} 功能开关'
+        
+        # 插入租户级配置
+        await db.execute(
+            text("""
+                INSERT INTO feature_switches (tenant_id, feature_code, feature_name, feature_group, is_enabled, description)
+                VALUES (:tenant_id, :feature_code, :feature_name, :feature_group, :is_enabled, :description)
+            """),
+            {
+                "tenant_id": tenant_id,
+                "feature_code": feature_code,
+                "feature_name": feature_name,
+                "feature_group": feature_group,
+                "is_enabled": 1 if is_enabled else 0,
+                "description": description
+            }
+        )
 
 
 # ============================================