diff --git a/src/kit/shell/src/shellWindows.c b/src/kit/shell/src/shellWindows.c
index d5ddc9d32a8dcd741865823b534c39e7248ae199..c426653ab529405509a4fe7d2c1003a1bd5679b3 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[];