diff --git a/install.sh b/install.sh
index d6b9d2d..ef8ba01 100755
--- a/install.sh
+++ b/install.sh
@@ -21,41 +21,74 @@ getCpuType () {
     cpu_info=`sysctl -n machdep.cpu.brand_string`
 
     if [[ $cpu_info == *"Intel"* ]]; then
-    	return 1	#intel芯片
+        return 1    #intel芯片
     fi
 
-    return 2	#默认为苹果芯片
+    return 2    #默认为苹果芯片
 }
 
+detectDomainCanConnect () {
+    domain=$1
+    if [ -z "${domain}" ]; then
+        echo "Usage: detectDomainCanConnect domain"
+        exit 1
+    fi
+
+    ping_res=`ping -c 3 "${domain}"`
+    if [[ $ping_res == *"100.0% packet loss"* ]]; then
+    	return 0
+    fi
+
+    return 1
+}
+
+#参数：connect_res，可选值：[0, 1]
 getDockerDesktopDownloadUrl () {
-	getCpuType
-	cup_type=$?
-	#原网址：https://desktop.docker.com/mac/main/arm64/Docker.dmg
-	dmgLink="https://static.jialuoma.cn/docker_desktop/arm64.dmg"
+    getCpuType
+    cup_type=$?
 
-	if [ $cup_type -eq 1 ]; then
-		#原网址：https://desktop.docker.com/mac/main/amd64/Docker.dmg
-		dmgLink="https://static.jialuoma.cn/docker_desktop/amd64.dmg"
-	fi
+    dmgLink_docker="https://desktop.docker.com/mac/main/arm64/Docker.dmg"
+    dmgLink="https://static.jialuoma.cn/docker_desktop/arm64.dmg"
 
-	echo "${dmgLink}"
+    if [ $cup_type -eq 1 ]; then
+        dmgLink_docker="https://desktop.docker.com/mac/main/amd64/Docker.dmg"
+        dmgLink="https://static.jialuoma.cn/docker_desktop/amd64.dmg"
+    fi
+
+    connect_res=$1
+    if [ $connect_res -eq 0 ]; then
+	    echo "${dmgLink}"
+    else
+        #原网址
+    	echo "${dmgLink_docker}"
+    fi
 }
 
 downloadDockerDesktop () {
-	link=$1
-	echo "docker desktop下载链接：${link}"
-	echo "即将在浏览器中打开docker desktop的下载链接并开始下载"
-	echo "请在docker desktop下载完成后，双击打开安装"
-	open "${link}"
-
-	echo "如果你已经安装完成，请按Y继续安装machete镜像"
-	read -p "docker desktop已安装，继续？(Y/N): " confirm && [[ $confirm == [yY] || $confirm == [yY][eE][sS] ]] || exit 1
-	echo "正在为你安装machete镜像..."
+    link=$1
+    if [ -z "${link}" ]; then
+        echo "Usage: downloadDockerDesktop url"
+        exit 1
+    fi
+
+    echo "docker desktop下载链接：${link}"
+    echo "即将在浏览器中打开docker desktop的下载链接并开始下载"
+    echo "请在docker desktop下载完成后，双击打开安装"
+    open "${link}"
+
+    echo "如果你已经安装完成，请按Y继续安装machete镜像"
+    read -p "docker desktop已安装，继续？(Y/N): " confirm && [[ $confirm == [yY] || $confirm == [yY][eE][sS] ]] || exit 1
+    echo "正在为你安装machete镜像..."
 }
 
-# 测试代码
+
+# 安装docker desktop和machete
 welcome
 getCpuInfo
 getCpuType
-link=`getDockerDesktopDownloadUrl`
+detect_domain='https://desktop.docker.com'
+echo "正在检测是否能连接[${detect_domain}]，请稍后..."
+detectDomainCanConnect "${detect_domain}"
+connect_res=$?
+link=`getDockerDesktopDownloadUrl $connect_res`
 downloadDockerDesktop "${link}"