diff --git a/app/templates/util/new_user.html b/app/templates/util/new_user.html
index ae9cee2..a617a6a 100644
--- a/app/templates/util/new_user.html
+++ b/app/templates/util/new_user.html
@@ -26,7 +26,7 @@
             <div class="form-group">
                 <label for="username" class="col-sm-2 control-label">用户名</label>
                 <div class="col-sm-10">
-                    <input type="text" class="form-control required" id="username" name="username"
+                    <input type="text" class="form-control required" id="username" name="username" maxlength="50"
                            placeholder="请输入名称" required data-msg-required="不能为空">
                 </div>
             </div>