diff --git a/zh-cn/application-dev/tools/aa-tool.md b/zh-cn/application-dev/tools/aa-tool.md
index 625e3636800ae24fa21b30b91051fcc2cbec7e44..eb3c727c7128072b7d51d3303448fc6ad30b299f 100644
--- a/zh-cn/application-dev/tools/aa-tool.md
+++ b/zh-cn/application-dev/tools/aa-tool.md
@@ -83,7 +83,7 @@ Ability assistant（Ability助手，简称为aa），是实现应用及测试用
 
   
   ```bash
-  aa start [-d <deviceId>] -a <abilityName> -b <bundleName> [-D]
+  aa dump -a
   ```
 
   ![aa-dump-a](figures/aa-dump-a.png)