diff --git a/docs/uniCloud/cf-functions.md b/docs/uniCloud/cf-functions.md
index 016d5399e5a9a0486d072bca38b7da411ede7c44..bc94dc52efb3482ada59817d588627de22e44020 100644
--- a/docs/uniCloud/cf-functions.md
+++ b/docs/uniCloud/cf-functions.md
@@ -666,7 +666,7 @@ exports.main = async function() {
 
 示例代码如下：
 
-```
+```js
 // 当前云函数名称 send-sms-cf
 'use strict';
 const db = uniCloud.database();