diff --git a/scripts/libs/check_port.sh b/scripts/libs/check_port.sh
new file mode 100644
index 00000000..76ca118d
--- /dev/null
+++ b/scripts/libs/check_port.sh
@@ -0,0 +1,17 @@
+#!/bin/sh
+# Copyright (C) Juewuy
+
+
+if [ $1 -gt 65535 -o $1 -le 1 ]; then
+	echo -e "\033[31m输入错误！请输入正确的数值(1-65535)！\033[0m"
+	exit 1
+elif [ -n "$(echo "|$mix_port|$redir_port|$dns_port|$db_port|" | grep "|$1|")" ]; then
+	echo -e "\033[31m输入错误！请不要输入重复的端口！\033[0m"
+	exit 1
+elif [ -n "$(netstat -ntul | grep ":$1 ")" ]; then
+	echo -e "\033[31m当前端口已被其他进程占用，请重新输入！\033[0m"
+	exit 1
+else
+	exit 0
+fi
+