diff --git a/db/updatesql/20260205-xj-system新增表.sql b/db/updatesql/20260205-xj-system新增表.sql
index 780c6d0..2e591f2 100644
--- a/db/updatesql/20260205-xj-system新增表.sql
+++ b/db/updatesql/20260205-xj-system新增表.sql
@@ -31,5 +31,5 @@ CREATE TABLE `sys_message_notice_scope` (
   PRIMARY KEY (`id`),
   KEY `idx_notice_id` (`notice_id`),
   KEY `idx_type` (`type`),
-  KEY `idx_scope_id` (`scope_id`)
+  KEY `idx_scope_notice` (`scope_id`, `notice_id`) COMMENT '联表查询复合索引，支持WHERE scope_id + JOIN notice_id'
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='消息通知范围表';