diff --git a/extend/seven/behavior/BindDomain.php b/extend/seven/behavior/BindDomain.php
new file mode 100644
index 00000000..e53db439
--- /dev/null
+++ b/extend/seven/behavior/BindDomain.php
@@ -0,0 +1,28 @@
+<?php
+/**
+ * @desc: 动态绑定二级域名
+ * @Author: Dr.Xing <ezfwork@foxmail.com>
+ * @Since: 2018/1/28 15:18
+ */
+
+namespace seven\behavior;
+
+use think\Route;
+use think\Cache;
+
+class BindDomain
+{
+    public function run()
+    {
+        $rules = Cache::get('rules');
+        if(!$rules) {
+            $rules = \app\common\model\Sites::refreshRulesCache();
+        }
+
+        foreach($rules as $k => $v){
+            Route::domain($v['s'], 'index'. $v['p']);
+            Route::domain('admin.'.$v['s'], 'admin'. $v['p']);
+        }
+    }
+
+}
\ No newline at end of file