diff --git a/app/Http/Controllers/Admin/MaintenanceController.php b/app/Http/Controllers/Admin/MaintenanceController.php
index c9519f8..7dc238a 100644
--- a/app/Http/Controllers/Admin/MaintenanceController.php
+++ b/app/Http/Controllers/Admin/MaintenanceController.php
@@ -18,7 +18,7 @@ class MaintenanceController extends Controller
      */
     public function index(): View
     {
-        $maintenances = (new Maintenance)->all();
+        $maintenances = (new Maintenance)->orderByStartAt()->get();
 
         return view('admin.maintenances.index', compact('maintenances'));
     }
diff --git a/app/Http/Controllers/Api/MaintenanceController.php b/app/Http/Controllers/Api/MaintenanceController.php
index 18d76a3..6fef1ea 100644
--- a/app/Http/Controllers/Api/MaintenanceController.php
+++ b/app/Http/Controllers/Api/MaintenanceController.php
@@ -10,7 +10,7 @@ class MaintenanceController extends Controller
 {
     public function __invoke(): JsonResponse
     {
-        $maintenances = (new Maintenance)->all();
+        $maintenances = (new Maintenance)->orderByStartAt()->get();
 
         return $this->success($maintenances);
     }
diff --git a/app/Models/Maintenance.php b/app/Models/Maintenance.php
index 64b1d46..16e34c5 100644
--- a/app/Models/Maintenance.php
+++ b/app/Models/Maintenance.php
@@ -30,6 +30,12 @@ class Maintenance extends Model
         'module',
     ];
 
+    // 根据 start_at 排序
+    public function scopeOrderByStartAt($query)
+    {
+        return $query->orderBy('start_at', 'desc');
+    }
+
     public function module()
     {
         return $this->belongsTo(Module::class);
diff --git a/database/migrations/2023_02_17_142300_create_maintenances_table.php b/database/migrations/2023_02_17_142300_create_maintenances_table.php
index f6c358e..e6fe36c 100644
--- a/database/migrations/2023_02_17_142300_create_maintenances_table.php
+++ b/database/migrations/2023_02_17_142300_create_maintenances_table.php
@@ -27,9 +27,9 @@ public function up(): void
             $table->foreign('module_id')->references('id')->on('modules')->onDelete('set null');
 
             // 开始于
-            $table->dateTime('start_at')->nullable();
+            $table->dateTime('start_at')->nullable()->index();
 
-            $table->dateTime('end_at')->nullable();
+            $table->dateTime('end_at')->nullable()->index();
         });
     }