diff --git a/build_backend.sh b/build_backend.sh
index 7c4f1f1..316467b 100644
--- a/build_backend.sh
+++ b/build_backend.sh
@@ -8,26 +8,31 @@ _yellow() { echo -e "\033[33m\033[01m$@\033[0m"; }
 _blue() { echo -e "\033[36m\033[01m$@\033[0m"; }
 
 # 创建资源池
-_green "正在创建资源池 mypool..."
-pvesh create /pools --poolid mypool
-_green "资源池 mypool 已创建！"
-
-# 安装必备模块
-apt-get update
-apt-get install -y sudo 
-apt-get install -y ifupdown2
-apt-get install -y lshw
-apt-get install -y iproute2 
-apt-get install -y net-tools
-apt-get install -y cloud-init
-if ! dpkg -s novnc > /dev/null 2>&1 ; then
-    apt-get update
-    apt-get install -y novnc
-    echo "noVNC已成功安装"
+POOL_ID="mypool"
+if pvesh get /pools/$POOL_ID > /dev/null 2>&1 ; then
+    echo "资源池 $POOL_ID 已经存在！"
 else
-    echo "noVNC已安装"
+    # 如果不存在则创建
+    _green "正在创建资源池 $POOL_ID..."
+    pvesh create /pools --poolid $POOL_ID
+    _green "资源池 $POOL_ID 已创建！"
 fi
 
+# 安装必备模块
+install_required_modules() {
+    modules=("sudo" "ifupdown2" "lshw" "iproute2" "net-tools" "cloud-init" "novnc")
+    for module in "${modules[@]}"
+    do
+        if dpkg -s $module > /dev/null 2>&1 ; then
+            echo "$module 已经安装！"
+        else
+            apt-get update
+            apt-get install -y $module
+            echo "$module 已成功安装！"
+        fi
+    done
+}
+install_required_modules
 
 # 检测AppArmor模块
 if ! dpkg -s apparmor > /dev/null 2>&1; then