diff --git a/danding_bot/plugins/onmyoji_gacha/rules.py b/danding_bot/plugins/onmyoji_gacha/rules.py
index 082bbd7..7ab7cd1 100644
--- a/danding_bot/plugins/onmyoji_gacha/rules.py
+++ b/danding_bot/plugins/onmyoji_gacha/rules.py
@@ -16,7 +16,7 @@ def _check_group_allowed(config) -> Callable:
     """生成群组权限检查函数（内部复用，消除重复逻辑）。
 
     Args:
-        config: Config实例，需包含ALLOWED_GROUPS属性
+        config: Config实例，需包含ALLOWED_GROUP_ID属性
 
     Returns:
         异步检查函数，私聊放行、群聊检查白名单
@@ -24,7 +24,8 @@ def _check_group_allowed(config) -> Callable:
     async def _check(bot: Bot, event: MessageEvent) -> bool:
         if not isinstance(event, GroupMessageEvent):
             return True
-        return str(event.group_id) in config.ALLOWED_GROUPS
+        # 单群模式：直接比较整数
+        return event.group_id == config.ALLOWED_GROUP_ID
     return _check