diff --git a/docs/zh/UserGuide/IoTDB-SQL-Language/Maintenance-Command.md b/docs/zh/UserGuide/IoTDB-SQL-Language/Maintenance-Command.md
index bc995d2..e17edc8 100644
--- a/docs/zh/UserGuide/IoTDB-SQL-Language/Maintenance-Command.md
+++ b/docs/zh/UserGuide/IoTDB-SQL-Language/Maintenance-Command.md
@@ -53,7 +53,7 @@
 IoTDB> CLEAR CACHE
 ```
 
-### SET STSTEM TO READONLY / WRITABLE
+### SET SYSTEM TO READONLY / WRITABLE
 
 手动设置系统为只读或者可写入模式。