diff --git a/README.md b/README.md
index 61b9a28..065290b 100644
--- a/README.md
+++ b/README.md
@@ -88,11 +88,11 @@ catkin_make
 启动roscore
 ```c
 roscore
+```
 添加环境变量
 ```c
 source /home/zmn/Gitea/ROS_Learn/devel/setup.bash
 ```
-```
 启动发送端
 ```c
 rosrun position_demo publisher_node.py