diff --git a/README.md b/README.md
index 2bbb1c9..c384ae2 100644
--- a/README.md
+++ b/README.md
@@ -84,6 +84,7 @@ https://github.com/superconvert/smart-os
 5. 防火墙
 
 # 网络拓扑图
+```shell
 +----------------------------------------------------------------+-----------------------------------------+-----------------------------------------+  
 |                          Host                                  |              Container 1                |              Container 2                |  
 |                                                                |                                         |                                         |  
@@ -112,6 +113,7 @@ https://github.com/superconvert/smart-os
 +---------------|------------------------------------------------+-----------------------------------------+-----------------------------------------+
                 ↓
      Physical Network  (192.168.0.0/24)
+```
 
 # 拓展知识