diff --git a/app/Http/Controllers/Admin/PlatformOrderController.php b/app/Http/Controllers/Admin/PlatformOrderController.php
index 2a22d9f..305b84b 100644
--- a/app/Http/Controllers/Admin/PlatformOrderController.php
+++ b/app/Http/Controllers/Admin/PlatformOrderController.php
@@ -11,6 +11,7 @@ use App\Models\SiteSubscription;
 use App\Support\BackUrl;
 use App\Support\SubscriptionActivationService;
 use Illuminate\Database\Eloquent\Builder;
+use Illuminate\Support\Facades\Cache;
 use Illuminate\Http\RedirectResponse;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\DB;
@@ -1717,6 +1718,14 @@ class PlatformOrderController extends Controller
         // 队列化（M3 可运维化第二步）：把批量 BMPA 投递为一个 Job，避免请求超时，并对齐 BAS 的批次可观测模式。
         $orderIds = $orders->pluck('id')->map(fn ($id) => (int) $id)->values()->all();
 
+        // 幂等/防抖（最小实现）：避免运营短时间内重复点击导致重复投递同一批次。
+        // 说明：这里做“短 TTL 的一次性锁”，不引入新表；后续可演进为批次表 + 幂等 key。
+        // key 口径：scope + filters + ids + limit（同一集合的重复点击会被拦截）。
+        $lockKey = 'admin:bmpa:dispatch:' . md5($scope . '|' . $filterSummary . '|' . implode(',', $orderIds) . '|' . $limit);
+        if (! Cache::add($lockKey, $runId, 60)) {
+            return redirect()->back()->with('warning', '检测到刚刚已提交过同一批次的 BMPA 任务（1 分钟内）。为避免重复投递，本次未再次提交。');
+        }
+
         \App\Jobs\BatchMarkPaidAndActivateJob::dispatch(
             $orderIds,
             (int) $admin->id,
diff --git a/tests/Feature/AdminPlatformOrderBatchMarkPaidAndActivateShouldNotDispatchDuplicateJobWithin1MinuteTest.php b/tests/Feature/AdminPlatformOrderBatchMarkPaidAndActivateShouldNotDispatchDuplicateJobWithin1MinuteTest.php
new file mode 100644
index 0000000..9bd141e
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderBatchMarkPaidAndActivateShouldNotDispatchDuplicateJobWithin1MinuteTest.php
@@ -0,0 +1,84 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Jobs\BatchMarkPaidAndActivateJob;
+use App\Models\Merchant;
+use App\Models\Plan;
+use App\Models\PlatformOrder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Support\Facades\Cache;
+use Illuminate\Support\Facades\Queue;
+use Tests\TestCase;
+
+class AdminPlatformOrderBatchMarkPaidAndActivateShouldNotDispatchDuplicateJobWithin1MinuteTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_should_block_duplicate_dispatch_within_1_minute(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        Queue::fake();
+        Cache::flush();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'batch_bmpa_dedupe_plan',
+            'name' => '批量 BMPA 去重投递测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 30,
+            'list_price' => 30,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_BMPA_DEDUPE_0001',
+            'order_type' => 'new_purchase',
+            'status' => 'pending',
+            'payment_status' => 'unpaid',
+            'plan_name' => $plan->name,
+            'billing_cycle' => $plan->billing_cycle,
+            'period_months' => 1,
+            'quantity' => 1,
+            'payable_amount' => 30,
+            'paid_amount' => 0,
+            'placed_at' => now()->subMinutes(10),
+        ]);
+
+        // 第一次：应投递
+        $this->post('/admin/platform-orders/batch-mark-paid-and-activate', [
+            'scope' => 'filtered',
+            'status' => 'pending',
+            'payment_status' => 'unpaid',
+            'limit' => 50,
+        ])->assertRedirect();
+
+        // 第二次（同一集合，1 分钟内）：应被阻断，不再投递
+        $res2 = $this->post('/admin/platform-orders/batch-mark-paid-and-activate', [
+            'scope' => 'filtered',
+            'status' => 'pending',
+            'payment_status' => 'unpaid',
+            'limit' => 50,
+        ]);
+
+        $res2->assertRedirect();
+        $res2->assertSessionHas('warning');
+
+        Queue::assertPushed(BatchMarkPaidAndActivateJob::class, 1);
+    }
+}