diff --git a/beike/Admin/Http/Controllers/CustomerController.php b/beike/Admin/Http/Controllers/CustomerController.php
index 51e514f3..0947976e 100644
--- a/beike/Admin/Http/Controllers/CustomerController.php
+++ b/beike/Admin/Http/Controllers/CustomerController.php
@@ -79,6 +79,9 @@ class CustomerController extends Controller
 
     public function destroy(Request $request, int $customerId)
     {
+        if ($customerId == setting('base.default_customer_group_id')) {
+            return json_fail(trans('customer_group.default_cannot_delete'));
+        }
         CustomerRepo::delete($customerId);
 
         return json_success(trans('common.deleted_success'));
diff --git a/resources/lang/en/admin/customer_group.php b/resources/lang/en/admin/customer_group.php
index 91488d30..29e76d93 100644
--- a/resources/lang/en/admin/customer_group.php
+++ b/resources/lang/en/admin/customer_group.php
@@ -14,5 +14,6 @@ return [
     'customer_groups_create' => 'Create',
     'customer_groups_show' => 'Detail',
     'customer_groups_update' => 'Edit',
-    'customer_groups_delete' => 'Delete'
+    'customer_groups_delete' => 'Delete',
+    'default_cannot_delete' => 'Default customer group cannot be deleted',
 ];
diff --git a/resources/lang/zh_cn/admin/customer_group.php b/resources/lang/zh_cn/admin/customer_group.php
index dde71a28..9b4e6c54 100644
--- a/resources/lang/zh_cn/admin/customer_group.php
+++ b/resources/lang/zh_cn/admin/customer_group.php
@@ -15,4 +15,5 @@ return [
     'customer_groups_show' => '客户组详情',
     'customer_groups_update' => '更新客户组',
     'customer_groups_delete' => '删除客户组',
+    'default_cannot_delete' => '默认客户组不能删除',
 ];