diff --git a/library/think/Request.php b/library/think/Request.php
index 5710c5cb..8a0dc80d 100644
--- a/library/think/Request.php
+++ b/library/think/Request.php
@@ -1342,14 +1342,18 @@ class Request
     /**
      * 当前请求的host
      * @access public
+     * @param bool $strict  true 仅仅获取HOST
      * @return string
      */
-    public function host()
+    public function host($strict = false)
     {
         if (isset($_SERVER['HTTP_X_REAL_HOST'])) {
-            return $_SERVER['HTTP_X_REAL_HOST'];
+            $host = $_SERVER['HTTP_X_REAL_HOST'];
+        } else {
+            $host = $this->server('HTTP_HOST');
         }
-        return $this->server('HTTP_HOST');
+
+        return true === $strict ? strstr($host, ':', true) : $host;
     }
 
     /**
diff --git a/library/think/Route.php b/library/think/Route.php
index f940d28b..99ffa706 100644
--- a/library/think/Route.php
+++ b/library/think/Route.php
@@ -737,7 +737,7 @@ class Route
         $rules = self::$rules['domain'];
         // 开启子域名部署 支持二级和三级域名
         if (!empty($rules)) {
-            $host = $request->host();
+            $host = $request->host(true);
             if (isset($rules[$host])) {
                 // 完整域名或者IP配置
                 $item = $rules[$host];
diff --git a/library/think/Url.php b/library/think/Url.php
index 53a545f9..bb697192 100644
--- a/library/think/Url.php
+++ b/library/think/Url.php
@@ -239,7 +239,7 @@ class Url
         $rootDomain = Config::get('url_domain_root');
         if (true === $domain) {
             // 自动判断域名
-            $domain = Config::get('app_host') ?: $request->host();
+            $domain = Config::get('app_host') ?: $request->host(true);
 
             $domains = Route::rules('domain');
             if ($domains) {