diff --git a/src/forge/Main/Index.js b/src/forge/Main/Index.js
index a0652a86..101d521f 100644
--- a/src/forge/Main/Index.js
+++ b/src/forge/Main/Index.js
@@ -310,7 +310,7 @@ class Index extends Component {
               <i class="iconfont icon-jiaruketang1"></i>
               <AddProjectModal {...this.props} showNotification={this.props.showNotification}/>
             </a>
-            <a href="https://data.educoder.net/api/attachments/1955244?disposition=inline" target="_blank">
+            <a href="https://public.educoder.net/开源社区项目开发简明使用手册.pdf" target="_blank">
               <i class="iconfont icon-xinshouzhiyin"></i>新手指引
             </a>
           </div>