diff --git a/app/templates/userpage_post.html b/app/templates/userpage_post.html
index ba3b38d..f7da573 100644
--- a/app/templates/userpage_post.html
+++ b/app/templates/userpage_post.html
@@ -19,10 +19,19 @@
 
     <title>EnglishPal Study Room for {{username}}</title>
 </head>
+<style>
+    #checkall{
+        opacity: 0;
+    }
+    #span{
+        opacity: 0;
+    }
+</style>
 <body>
      <p>勾选不认识的单词</p>
       <form method="post" action="/{{username}}/mark">
        <input type="submit" name="add-btn" value="加入我的生词簿"/>
+       <input type="checkbox" name="add-btn" value="全选"id="checkall"/><span id="span">全选</span><br>
        {% for x in lst %}
           {% set word = x[0]%}
         <p>
@@ -32,7 +41,6 @@
             ({{x[1]}})
             <input type="checkbox" name="marked" value={{word}}>
         </p>
-
        {% endfor %}
        </form>
     {{ yml['footer'] | safe }}
@@ -41,5 +49,22 @@
             <script src="{{ js }}" ></script>
         {% endfor %}
     {% endif %}
+            <script>
+        let all=document.getElementById("checkall");
+        let span=document.getElementById("span");
+        let checks=document.getElementsByName("marked")
+        if(checks.length>10){
+            all.style.opacity='1'
+            span.style.opacity='1'
+        }
+    all.addEventListener("click",function(){     //在按钮处设置监听
+            let flag=all.checked;                   //把按钮的checked值赋给flag
+        for(let i=0;i<checks.length;i++){        
+            //循环多选框元素集，把多选框的checked改成flag，
+            //当btn选中，其他也选中，状态跟随
+            checks[i].checked=flag;
+        }
+    })
+            </script>
 </body>
 </html>
\ No newline at end of file
