diff --git a/app/admin/view/config/system.html b/app/admin/view/config/system.html
index 841587b36..a441b6031 100644
--- a/app/admin/view/config/system.html
+++ b/app/admin/view/config/system.html
@@ -16,6 +16,22 @@
             <span class="help-block">名称由英文字母开头且不能存在相同名称的应用，设置之后原地址不能继续访问！</span>
         </div>
 
+        <div class="layui-form-item">
+            <div class="help-label label-required-prev"><b>后台默认主题</b>Theme</div>
+            <div class="layui-input">
+                {foreach ['default'=>'默认主题','white'=>'简约白色'] as $k=>$v}
+                <label class="think-radio">
+                    {if sysconf('base.site_theme') eq $k}
+                    <input name="site_theme" type="radio" value="{$k}" lay-ignore checked> {$v}
+                    {else}
+                    <input name="site_theme" type="radio" value="{$k}" lay-ignore> {$v}
+                    {/if}
+                </label>
+                {/foreach}
+            </div>
+            <span class="help-block">用户登录管理后台默认会以此配置的主题显示管理界面，用户也可以单独修改配置主题！</span>
+        </div>
+
         <div class="layui-form-item">
             <div class="help-label label-required-prev"><b>浏览器小图标</b>Icon</div>
             <label class="relative block label-required-null">