diff --git a/flash-tool/command_line.c b/flash-tool/command_line.c
index c48a038..044ff9b 100644
--- a/flash-tool/command_line.c
+++ b/flash-tool/command_line.c
@@ -27,10 +27,11 @@
 #include "cmd.h"
 #include "config.h"
  
+#define COMMAND_NUM 31
 #define MAX_ARGC	10
-#define MAX_ARGV_LENGTH	100
+#define MAX_COMMAND_LENGTH	100
 static int com_argc;
-static char com_argv[MAX_ARGC][MAX_ARGV_LENGTH];
+static char com_argv[MAX_ARGC][MAX_COMMAND_LENGTH];
 
 static const char COMMAND[][30]=
 {
@@ -143,7 +144,7 @@ int command_interpret(char * com_buf)
 		} else {
 			com_argv[i][j] = *buf;
 			j++;
-			if (j > MAX_ARGV_LENGTH) {
+			if (j > MAX_COMMAND_LENGTH) {
 				printf("\n Para is too long! About!");
 				return 0;
 			}
diff --git a/flash-tool/usb_boot_defines.h b/flash-tool/usb_boot_defines.h
index 7905c2a..4933d6d 100644
--- a/flash-tool/usb_boot_defines.h
+++ b/flash-tool/usb_boot_defines.h
@@ -27,8 +27,6 @@
 #define CODE_SIZE  ( 4 * 1024 * 1024 )
 /* #define START_ADDR ( 0x80000000 + SDRAM_SIZE - CODE_SIZE ) */
 
-#define MAX_COMMAND_LENGTH 100
-#define COMMAND_NUM 31
 #define NAND_MAX_BLK_NUM  10000000	/* ((Hand.nand_pn / Hand.nand_ppb) + 1) */
 #define NAND_MAX_PAGE_NUM 1073740824	/*Hand.nand_pn */
 #define NAND_SECTION_NUM 23