diff --git a/MACA.md b/MACA.md
index 97b5bc0..2de8d35 100644
--- a/MACA.md
+++ b/MACA.md
@@ -14,7 +14,7 @@
    yum makecache
    ```
 
-### 安装
+#### 安装
 
    -  **1.安装maca_sdk最新版本**
       ```bash