diff --git a/index.hbs b/index.hbs
index 21a8d46..1d327c3 100755
--- a/index.hbs
+++ b/index.hbs
@@ -69,6 +69,7 @@
         <!-- 顶栏 -->
         <mdui-top-app-bar class="topbar" scroll-behavior="elevate">
             <mdui-button-icon icon="menu" id="open-drawer"></mdui-button-icon>
+            <mdui-button id="back-home" href="/">主页</mdui-button>
             <mdui-button class="hideonmobile" id="open-study-env">实验环境</mdui-button>
             <mdui-top-app-bar-title>{{ book_title }}</mdui-top-app-bar-title>