diff --git a/code/lib/source/sifar/code/source/common/sf_common.c b/code/lib/source/sifar/code/source/common/sf_common.c
index 453e6d5cb..2b63c91ca 100755
--- a/code/lib/source/sifar/code/source/common/sf_common.c
+++ b/code/lib/source/sifar/code/source/common/sf_common.c
@@ -1352,7 +1352,11 @@ BOOL sf_cmd_ftp_ota(unsigned char argc, char **argv)
 	//UINT32 value;
 	UIMenuStoreInfo *puiPara = sf_ui_para_get();
 	if(4 == argc)
-    {	
+    {
+        memset(puiPara ->OtaFtpIp,'\0', sizeof(puiPara ->OtaFtpIp));
+        memset(puiPara ->OtaFtpPort, '\0', sizeof(puiPara ->OtaFtpPort));
+        memset(puiPara ->OtaFtpUserName, '\0', sizeof(puiPara ->OtaFtpUserName));
+        memset(puiPara ->OtaFtpPassWord,'\0', sizeof(puiPara ->OtaFtpPassWord));
         strncpy((char *)puiPara->OtaFtpIp, argv[0], ((sizeof(puiPara->OtaFtpIp) <= strlen(argv[0])) ? (sizeof(puiPara->OtaFtpIp)) : (strlen(argv[0]))));
 		strncpy((char *)puiPara->OtaFtpPort, argv[1], ((sizeof(puiPara->OtaFtpPort) <= strlen(argv[1])) ? (sizeof(puiPara->OtaFtpPort)) : (strlen(argv[1]))));
         strncpy((char *)puiPara->OtaFtpUserName, argv[2], ((sizeof(puiPara->OtaFtpUserName) <= strlen(argv[2])) ? (sizeof(puiPara->OtaFtpUserName)) : (strlen(argv[2]))));