diff --git a/app/views/oauth/register.html.erb b/app/views/oauth/register.html.erb
index 391f04661..e745d9496 100644
--- a/app/views/oauth/register.html.erb
+++ b/app/views/oauth/register.html.erb
@@ -11,7 +11,7 @@
       </div>
       <div class="indexInfo">
         <span>用户名称：</span>
-        <%= text_field_tag :lastname, params[:lastname], placeholder: '登录平台后显示的用户名称', readonly: true, id: 'lastname' %>
+        <%= text_field_tag :lastname, params[:lastname], placeholder: '登录平台后显示的用户名称', maxlength: 40, id: 'lastname' %>
         <p class="checkInfo lastnameCheck"><span></span></p>
       </div>
       <div class="indexInfo">
@@ -21,7 +21,7 @@
       </div>
       <div class="indexInfo">
         <span>密码：</span>
-        <%= password_field_tag :password, '', placeholder: '输入EduCoder账号密码或新的密码', id: 'password'  %>
+        <%= password_field_tag :password, '', placeholder: '输入EduCoder账号密码或新的密码',maxlength: 15, id: 'password'  %>
         <p class="checkInfo passwordCheck"><span></span></p>
       </div>
       <div class="indexBtn">