diff --git a/app/Http/Controllers/Admin/PlatformOrderController.php b/app/Http/Controllers/Admin/PlatformOrderController.php
index 6c876a9..ed7de7b 100644
--- a/app/Http/Controllers/Admin/PlatformOrderController.php
+++ b/app/Http/Controllers/Admin/PlatformOrderController.php
@@ -78,8 +78,7 @@ class PlatformOrderController extends Controller
             'plans' => $plans,
             'siteSubscription' => $siteSubscription,
             'billingCycleLabels' => $this->billingCycleLabels(),
-            // order_type label 映射已下沉到 PlatformOrder::orderTypeLabel()；这里不再透传 orderTypeLabels
-            // 'orderTypeLabels' => $this->orderTypeLabels(),
+            'orderTypeLabels' => $this->orderTypeLabels(),
             'defaults' => $defaults,
         ]);
     }
@@ -91,7 +90,13 @@ class PlatformOrderController extends Controller
         $data = $request->validate([
             'merchant_id' => ['required', 'integer', 'exists:merchants,id'],
             'plan_id' => ['required', 'integer', 'exists:plans,id'],
-            'site_subscription_id' => ['nullable', 'integer', 'exists:site_subscriptions,id'],
+            // 治理口径：续费单必须绑定订阅（否则无法做到“续期/延长到期”这一核心闭环）
+            'site_subscription_id' => [
+                Rule::requiredIf(fn () => (string) $request->input('order_type') === 'renewal'),
+                'nullable',
+                'integer',
+                'exists:site_subscriptions,id',
+            ],
             'order_type' => ['required', Rule::in(array_keys($this->orderTypeLabels()))],
             'quantity' => ['required', 'integer', 'min:1', 'max:120'],
             'discount_amount' => ['nullable', 'numeric', 'min:0'],
diff --git a/tests/Feature/AdminPlatformOrderCreateDefaultsPreselectedTest.php b/tests/Feature/AdminPlatformOrderCreateDefaultsPreselectedTest.php
index 4e4acb0..3e75b07 100644
--- a/tests/Feature/AdminPlatformOrderCreateDefaultsPreselectedTest.php
+++ b/tests/Feature/AdminPlatformOrderCreateDefaultsPreselectedTest.php
@@ -68,7 +68,8 @@ class AdminPlatformOrderCreateDefaultsPreselectedTest extends TestCase
         // 预选 merchant/plan/order_type
         $res->assertSee('<option value="' . $merchant->id . '" selected>', false);
         $res->assertSee('<option value="' . $plan->id . '" selected>', false);
-        $res->assertSee('<option value="renewal" selected>', false);
+        // 兼容不同 Laravel 版本对 @selected 的渲染形式（selected 或 selected="selected"）
+        $res->assertSee('value="renewal" selected', false);
 
         // 预填其它字段
         $res->assertSee('name="site_subscription_id" value="' . $sub->id . '"', false);
diff --git a/tests/Feature/AdminPlatformOrderStoreShouldRequireSubscriptionForRenewalTest.php b/tests/Feature/AdminPlatformOrderStoreShouldRequireSubscriptionForRenewalTest.php
new file mode 100644
index 0000000..217baa5
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderStoreShouldRequireSubscriptionForRenewalTest.php
@@ -0,0 +1,54 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Merchant;
+use App\Models\Plan;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderStoreShouldRequireSubscriptionForRenewalTest 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_store_should_reject_renewal_order_when_site_subscription_id_missing(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'po_store_renewal_requires_sub_plan',
+            'name' => '续费必须绑定订阅测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $res = $this->from('/admin/platform-orders/create')->post('/admin/platform-orders', [
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_type' => 'renewal',
+            'quantity' => 1,
+            'discount_amount' => 0,
+            'payment_channel' => 'offline',
+            'remark' => 'try renewal without sub',
+            // site_subscription_id 故意不传
+        ]);
+
+        $res->assertStatus(302);
+        $res->assertSessionHasErrors('site_subscription_id');
+    }
+}