diff --git a/convention.php b/convention.php
index d958784b..25fab9ed 100644
--- a/convention.php
+++ b/convention.php
@@ -83,6 +83,8 @@ return [
     'url_controller_convert' => true,
     // 是否自动转换URL中的操作名
     'url_action_convert'     => true,
+    // 表单请求类型伪装变量
+    'method_var'             => '_method',
 
     // +----------------------------------------------------------------------
     // | 模板引擎设置
diff --git a/library/think/Request.php b/library/think/Request.php
index 1bfaaf71..4c5f305d 100644
--- a/library/think/Request.php
+++ b/library/think/Request.php
@@ -417,7 +417,12 @@ class Request
             $this->method = $method;
             return;
         } elseif (!$this->method) {
-            $this->method = IS_CLI ? 'GET' : (isset($this->server['REQUEST_METHOD']) ? $this->server['REQUEST_METHOD'] : $_SERVER['REQUEST_METHOD']);
+            $mask = $this->param(Config::get('method_var'));
+            if ($mask) {
+                $this->method = $mask;
+            } else {
+                $this->method = IS_CLI ? 'GET' : (isset($this->server['REQUEST_METHOD']) ? $this->server['REQUEST_METHOD'] : $_SERVER['REQUEST_METHOD']);
+            }
         }
         return $this->method;
     }