diff --git a/resources/views/admin/platform_orders/show.blade.php b/resources/views/admin/platform_orders/show.blade.php
index 4b94952..978831b 100644
--- a/resources/views/admin/platform_orders/show.blade.php
+++ b/resources/views/admin/platform_orders/show.blade.php
@@ -465,7 +465,7 @@
                     </div>
 
                     <div class="mt-10">
-                        <form method="post" action="/admin/platform-orders/{{ $order->id }}/attach-subscription" class="inline-form" onsubmit="return confirm('确认将该订单绑定到所选订阅？该操作会写入审计留痕（meta.audit）');">
+                        <form method="post" action="/admin/platform-orders/{{ $order->id }}/attach-subscription" class="inline-form" data-action="disable-on-submit" onsubmit="return confirm('确认将该订单绑定到所选订阅？该操作会写入审计留痕（meta.audit）');">
                             @csrf
                             <label class="muted" for="attach_site_subscription_id">绑定订阅ID</label>
                             <input id="attach_site_subscription_id" name="site_subscription_id" type="number" min="1" class="input input-sm" placeholder="输入订阅ID" required>
diff --git a/tests/Feature/AdminPlatformOrderShowAttachSubscriptionFormShouldDisableOnSubmitTest.php b/tests/Feature/AdminPlatformOrderShowAttachSubscriptionFormShouldDisableOnSubmitTest.php
new file mode 100644
index 0000000..8f2f7a8
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderShowAttachSubscriptionFormShouldDisableOnSubmitTest.php
@@ -0,0 +1,66 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Merchant;
+use App\Models\Plan;
+use App\Models\PlatformOrder;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderShowAttachSubscriptionFormShouldDisableOnSubmitTest 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_show_attach_subscription_form_should_have_disable_on_submit_marker(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'po_show_attach_form_disable_plan',
+            'name' => '订单详情绑定订阅表单防重复提交测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 30,
+            'list_price' => 30,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_SHOW_ATTACH_FORM_DISABLE_0001',
+            'order_type' => 'renewal',
+            '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(),
+            'meta' => [],
+        ]);
+
+        $res = $this->get('/admin/platform-orders/' . $order->id);
+        $res->assertOk();
+
+        $html = (string) $res->getContent();
+
+        $this->assertStringContainsString('/admin/platform-orders/' . $order->id . '/attach-subscription', $html);
+        $this->assertStringContainsString('data-action="disable-on-submit"', $html);
+    }
+}