diff --git a/zh-cn/application-dev/reference/apis/js-apis-pointer.md b/zh-cn/application-dev/reference/apis/js-apis-pointer.md
index 27fe548cb159b27ca0c2a857c10b31834a5af418..ca0c6bfba4183825a184ac8c608d40ca85004f4a 100755
--- a/zh-cn/application-dev/reference/apis/js-apis-pointer.md
+++ b/zh-cn/application-dev/reference/apis/js-apis-pointer.md
@@ -550,7 +550,7 @@ try {
 
 ## pointer.setMouseScrollRows<sup>10+</sup>
 
-setMouseScrollRows(speed: number): Promise&lt;void&gt;
+setMouseScrollRows(rows: number): Promise&lt;void&gt;
 
 设置鼠标滚动行数，使用Promise异步方式返回结果。