diff --git a/MACA.md b/MACA.md
index ba9f835..b7029b0 100644
--- a/MACA.md
+++ b/MACA.md
@@ -17,25 +17,25 @@
 
   -  **YUM安装MACA SDK**
 
-     - 1.安装maca_sdk最新版本
+     -  **1.安装maca_sdk最新版本**
          ```bash
          yum install maca_sdk
           ```
 
-   - **2.安装maca_sdk指定版本**
-      ```bash
-      yum install maca_sdk-<version>-<release>
-      ```
+      - **2.安装maca_sdk指定版本**
+         ```bash
+         yum install maca_sdk-<version>-<release>
+         ```
 
-   - **3.升级maca_sdk到最新版本**
-      ```bash
-      yum upgrade maca_sdk
-      ```
+      - **3.升级maca_sdk到最新版本**
+         ```bash
+         yum upgrade maca_sdk
+         ```
 
-   - **4.卸载maca_sdk**
-      ```bash
-      yum remove maca_sdk
-      ```
+      - **4.卸载maca_sdk**
+         ```bash
+         yum remove maca_sdk
+         ```
 
 -  **适配所有 Ubuntu 系统**