diff --git a/src/kit/shell/src/shellWindows.c b/src/kit/shell/src/shellWindows.c
index 0babd88333c846c1f0b5dbe4baede4a6d38cbcdd..b1c85d951bf1f8cf801286f51b84d47d9c893b5c 100644
--- a/src/kit/shell/src/shellWindows.c
+++ b/src/kit/shell/src/shellWindows.c
@@ -17,7 +17,7 @@
 #include "taos.h"
 #include "shellCommand.h"
 
-#define SHELL_INPUT_MAX_COMMAND_SIZE 500000
+#define SHELL_INPUT_MAX_COMMAND_SIZE 10000
 
 extern char configDir[];