diff --git a/how_to_use_mysql/readme.md b/how_to_use_mysql/readme.md
index 9a2286b..1b67a28 100644
--- a/how_to_use_mysql/readme.md
+++ b/how_to_use_mysql/readme.md
@@ -9,6 +9,6 @@
 ## 注意：牢记下列的端口号3306
 ![图1](./images/04.png)
 ![图1](./images/05.png)
-##4 注意：牢记下列设置的密码
+## 注意：牢记下列设置的密码
 ![图1](./images/06.png)
 ![图1](./images/07.png)
\ No newline at end of file