diff --git a/convention.php b/convention.php
index 25fab9ed..c86e1ea5 100644
--- a/convention.php
+++ b/convention.php
@@ -84,7 +84,7 @@ return [
     // 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',
+    'var_method'             => '_method',
 
     // +----------------------------------------------------------------------
     // | 模板引擎设置
diff --git a/library/think/Request.php b/library/think/Request.php
index 4c5f305d..df023124 100644
--- a/library/think/Request.php
+++ b/library/think/Request.php
@@ -417,7 +417,7 @@ class Request
             $this->method = $method;
             return;
         } elseif (!$this->method) {
-            $mask = $this->param(Config::get('method_var'));
+            $mask = $this->param(Config::get('var_method'));
             if ($mask) {
                 $this->method = $mask;
             } else {