diff --git a/scripts/install.sh b/scripts/install.sh
index 9605304f1..5ef876401 100755
--- a/scripts/install.sh
+++ b/scripts/install.sh
@@ -4,6 +4,12 @@ export PATH
 # LANG=en_US.UTF-8
 is64bit=`getconf LONG_BIT`
 
+if [ -f /www/server/mdserver-web/tool.py ];then
+	echo -e "存在旧版代码,不能安装!,已知风险的情况下" 
+	echo -e "rm -rf /www/server/mdserver-web"
+	echo -e "可安装!" 
+fi
+
 LOG_FILE=/var/log/mw-install.log
 
 {
diff --git a/scripts/install_dev.sh b/scripts/install_dev.sh
index 608a2d556..744091cf7 100755
--- a/scripts/install_dev.sh
+++ b/scripts/install_dev.sh
@@ -4,6 +4,13 @@ export PATH
 # LANG=en_US.UTF-8
 is64bit=`getconf LONG_BIT`
 
+if [ -f /www/server/mdserver-web/tool.py ];then
+	echo -e "存在旧版代码,不能安装!,已知风险的情况下" 
+	echo -e "rm -rf /www/server/mdserver-web"
+	echo -e "可安装!" 
+fi
+
+
 echo -e "您正在安装的是\033[31mmdserver-web测试版\033[0m，非开发测试用途请使用正式版 install.sh ！" 
 echo -e "You are installing\033[31m mdserver-web dev version\033[0m, normally use install.sh for production.\n" 
 sleep 1
diff --git a/scripts/update.sh b/scripts/update.sh
index ecf7ae0bb..8d7c12d69 100755
--- a/scripts/update.sh
+++ b/scripts/update.sh
@@ -6,6 +6,13 @@ is64bit=`getconf LONG_BIT`
 
 startTime=`date +%s`
 
+if [ -f /www/server/mdserver-web/tool.py ];then
+	echo -e "存在旧版代码,不能安装!,已知风险的情况下" 
+	echo -e "rm -rf /www/server/mdserver-web"
+	echo -e "可安装!" 
+fi
+
+
 _os=`uname`
 echo "use system: ${_os}"
 
diff --git a/scripts/update_dev.sh b/scripts/update_dev.sh
index 7c4d2ebd6..dc7deb71a 100755
--- a/scripts/update_dev.sh
+++ b/scripts/update_dev.sh
@@ -6,6 +6,12 @@ is64bit=`getconf LONG_BIT`
 
 startTime=`date +%s`
 
+if [ -f /www/server/mdserver-web/tool.py ];then
+	echo -e "存在旧版代码,不能安装!,已知风险的情况下" 
+	echo -e "rm -rf /www/server/mdserver-web"
+	echo -e "可安装!" 
+fi
+
 _os=`uname`
 echo "use system: ${_os}"