---
title: 400 Bad Request
slug: Web/HTTP/Status/400
tags:
  - 客户端错误
  - 状态码
translation_of: Web/HTTP/Status/400
---
<div>{{HTTPSidebar}}</div>

<p>HTTP <strong>400 <code>Bad Request</code></strong> 响应状态码表示由于语法无效，服务器无法理解该请求。 客户端不应该在未经修改的情况下重复此请求。</p>

<h2 id="状态">状态</h2>

<pre class="syntaxbox">400 Bad Request </pre>

<h2 id="规范">规范</h2>

<table class="standard-table">
 <tbody>
  <tr>
   <th scope="col">Specification</th>
   <th scope="col">Title</th>
  </tr>
  <tr>
   <td>{{RFC("7231", "400 Bad Request" , "6.5.1")}}</td>
   <td>Hypertext Transfer Protocol (HTTP/1.1): Semantics and Content</td>
  </tr>
 </tbody>
</table>