diff --git a/docs/social-media.md b/docs/social-media.md
index 7c7989e1d..e7280fc7b 100644
--- a/docs/social-media.md
+++ b/docs/social-media.md
@@ -852,7 +852,7 @@ YouTube 官方亦有提供频道 RSS，形如 <https://www.youtube.com/feeds/vid
 
 ### 博主
 
-<Route author="Max-Tortoise Rongronggg9" example="/douyin/user/MS4wLjABAAAARcAHmmF9mAG3JEixq_CdP72APhBlGlLVbN-1eBcPqao" path="/douyin/user/:uid/:routeParams?" :paramsDesc="['uid，可在 URL 中找到', '额外参数，query string 格式，请参阅下面的表格']" anticrawler="1" radar="1" rssbud="1" puppeteer="1">
+<Route author="Max-Tortoise Rongronggg9" example="/douyin/user/MS4wLjABAAAARcAHmmF9mAG3JEixq_CdP72APhBlGlLVbN-1eBcPqao" path="/douyin/user/:uid/:routeParams?" :paramsDesc="['uid，可在用户页面 URL 中找到', '额外参数，query string 格式，请参阅下面的表格']" anticrawler="1" radar="1" rssbud="1" puppeteer="1">
 
 | 键        | 含义                                  | 值                      | 默认值     |
 | -------- | ----------------------------------- | ---------------------- | ------- |
diff --git a/lib/v2/douyin/user.js b/lib/v2/douyin/user.js
index d954f8dbe..01fffe684 100644
--- a/lib/v2/douyin/user.js
+++ b/lib/v2/douyin/user.js
@@ -49,6 +49,9 @@ const getOriginAvatar = (url) =>
 
 module.exports = async (ctx) => {
     const uid = ctx.params.uid;
+    if (!uid.startsWith('MS4wLjABAAAA')) {
+        throw Error('Invalid UID. UID should start with <b>MS4wLjABAAAA</b>.');
+    }
     const routeParams = Object.fromEntries(new URLSearchParams(ctx.params.routeParams));
     const embed = fallback(undefined, queryToBoolean(routeParams.embed), false); // embed video
     const iframe = fallback(undefined, queryToBoolean(routeParams.iframe), false); // embed video in iframe