diff --git a/app/Http/Controllers/Admin/PlatformOrderController.php b/app/Http/Controllers/Admin/PlatformOrderController.php
index d49b326..8ed604d 100644
--- a/app/Http/Controllers/Admin/PlatformOrderController.php
+++ b/app/Http/Controllers/Admin/PlatformOrderController.php
@@ -977,6 +977,11 @@ class PlatformOrderController extends Controller
     {
         $this->ensurePlatformAdmin($request);
 
+        // 安全阀：必须显式声明 download=1，避免浏览器预取/误触发导致频繁导出
+        if ((string) $request->query('download', '') !== '1') {
+            abort(400, 'download=1 required');
+        }
+
         $filters = [
             'status' => trim((string) $request->query('status', '')),
             'payment_status' => trim((string) $request->query('payment_status', '')),
diff --git a/resources/views/admin/platform_orders/index.blade.php b/resources/views/admin/platform_orders/index.blade.php
index f07a46b..ff04157 100644
--- a/resources/views/admin/platform_orders/index.blade.php
+++ b/resources/views/admin/platform_orders/index.blade.php
@@ -440,6 +440,7 @@
     @endif
 
     <form method="get" action="/admin/platform-orders/export" class="mb-10">
+        <input type="hidden" name="download" value="1">
         <input type="hidden" name="status" value="{{ $filters['status'] ?? '' }}">
         <input type="hidden" name="payment_status" value="{{ $filters['payment_status'] ?? '' }}">
         <input type="hidden" name="merchant_id" value="{{ $filters['merchant_id'] ?? '' }}">
diff --git a/tests/Feature/AdminPlatformOrderExportBmpaFiltersTest.php b/tests/Feature/AdminPlatformOrderExportBmpaFiltersTest.php
index 2a20c5f..e48060e 100644
--- a/tests/Feature/AdminPlatformOrderExportBmpaFiltersTest.php
+++ b/tests/Feature/AdminPlatformOrderExportBmpaFiltersTest.php
@@ -77,7 +77,7 @@ class AdminPlatformOrderExportBmpaFiltersTest extends TestCase
             'placed_at' => now(),
         ]);
 
-        $res = $this->get('/admin/platform-orders/export?bmpa_failed_only=1');
+        $res = $this->get('/admin/platform-orders/export?download=1&bmpa_failed_only=1');
         $res->assertOk();
 
         $content = $res->streamedContent();
@@ -147,7 +147,7 @@ class AdminPlatformOrderExportBmpaFiltersTest extends TestCase
             ],
         ]);
 
-        $res = $this->get('/admin/platform-orders/export?bmpa_error_keyword=' . urlencode('回执'));
+        $res = $this->get('/admin/platform-orders/export?download=1&bmpa_error_keyword=' . urlencode('回执'));
         $res->assertOk();
 
         $content = $res->streamedContent();
diff --git a/tests/Feature/AdminPlatformOrderExportDownloadSafetyValveTest.php b/tests/Feature/AdminPlatformOrderExportDownloadSafetyValveTest.php
new file mode 100644
index 0000000..565b221
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderExportDownloadSafetyValveTest.php
@@ -0,0 +1,33 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderExportDownloadSafetyValveTest 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_export_should_require_download_flag(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $this->get('/admin/platform-orders/export')
+            ->assertStatus(400)
+            ->assertSee('download=1 required');
+
+        $this->get('/admin/platform-orders/export?download=1')
+            ->assertOk();
+    }
+}
diff --git a/tests/Feature/AdminPlatformOrderExportReceiptStatusFilterTest.php b/tests/Feature/AdminPlatformOrderExportReceiptStatusFilterTest.php
index 31038ea..ebc8789 100644
--- a/tests/Feature/AdminPlatformOrderExportReceiptStatusFilterTest.php
+++ b/tests/Feature/AdminPlatformOrderExportReceiptStatusFilterTest.php
@@ -107,14 +107,14 @@ class AdminPlatformOrderExportReceiptStatusFilterTest extends TestCase
             'meta' => [],
         ]);
 
-        $res1 = $this->get('/admin/platform-orders/export?receipt_status=has');
+        $res1 = $this->get('/admin/platform-orders/export?download=1&receipt_status=has');
         $res1->assertOk();
         $content1 = $res1->streamedContent();
         $this->assertStringContainsString('PO_EXPORT_RECEIPT_HAS_0001', $content1);
         $this->assertStringContainsString('PO_EXPORT_RECEIPT_HAS_0002', $content1);
         $this->assertStringNotContainsString('PO_EXPORT_RECEIPT_NONE_0003', $content1);
 
-        $res2 = $this->get('/admin/platform-orders/export?receipt_status=none');
+        $res2 = $this->get('/admin/platform-orders/export?download=1&receipt_status=none');
         $res2->assertOk();
         $content2 = $res2->streamedContent();
         $this->assertStringContainsString('PO_EXPORT_RECEIPT_NONE_0003', $content2);
diff --git a/tests/Feature/AdminPlatformOrderExportReconcileMismatchFilterTest.php b/tests/Feature/AdminPlatformOrderExportReconcileMismatchFilterTest.php
index 5826b08..3b0f5bf 100644
--- a/tests/Feature/AdminPlatformOrderExportReconcileMismatchFilterTest.php
+++ b/tests/Feature/AdminPlatformOrderExportReconcileMismatchFilterTest.php
@@ -88,7 +88,7 @@ class AdminPlatformOrderExportReconcileMismatchFilterTest extends TestCase
             ],
         ]);
 
-        $res = $this->get('/admin/platform-orders/export?reconcile_mismatch=1');
+        $res = $this->get('/admin/platform-orders/export?download=1&reconcile_mismatch=1');
         $res->assertOk();
 
         $content = $res->streamedContent();
diff --git a/tests/Feature/AdminPlatformOrderExportRefundInconsistentFilterTest.php b/tests/Feature/AdminPlatformOrderExportRefundInconsistentFilterTest.php
index 4bf969f..578a409 100644
--- a/tests/Feature/AdminPlatformOrderExportRefundInconsistentFilterTest.php
+++ b/tests/Feature/AdminPlatformOrderExportRefundInconsistentFilterTest.php
@@ -115,7 +115,7 @@ class AdminPlatformOrderExportRefundInconsistentFilterTest extends TestCase
             ],
         ]);
 
-        $res = $this->get('/admin/platform-orders/export?refund_inconsistent=1');
+        $res = $this->get('/admin/platform-orders/export?download=1&refund_inconsistent=1');
         $res->assertOk();
 
         $content = $res->streamedContent();
diff --git a/tests/Feature/AdminPlatformOrderExportRefundInconsistentToleranceConfigTest.php b/tests/Feature/AdminPlatformOrderExportRefundInconsistentToleranceConfigTest.php
index 41d6e5d..d100dee 100644
--- a/tests/Feature/AdminPlatformOrderExportRefundInconsistentToleranceConfigTest.php
+++ b/tests/Feature/AdminPlatformOrderExportRefundInconsistentToleranceConfigTest.php
@@ -142,7 +142,7 @@ class AdminPlatformOrderExportRefundInconsistentToleranceConfigTest extends Test
             ],
         ]);
 
-        $res = $this->get('/admin/platform-orders/export?refund_inconsistent=1');
+        $res = $this->get('/admin/platform-orders/export?download=1&refund_inconsistent=1');
         $res->assertOk();
 
         $content = $res->streamedContent();
diff --git a/tests/Feature/AdminPlatformOrderExportRefundReceiptFieldsTest.php b/tests/Feature/AdminPlatformOrderExportRefundReceiptFieldsTest.php
index d919c2f..b66492b 100644
--- a/tests/Feature/AdminPlatformOrderExportRefundReceiptFieldsTest.php
+++ b/tests/Feature/AdminPlatformOrderExportRefundReceiptFieldsTest.php
@@ -78,7 +78,7 @@ class AdminPlatformOrderExportRefundReceiptFieldsTest extends TestCase
             ],
         ]);
 
-        $res = $this->get('/admin/platform-orders/export');
+        $res = $this->get('/admin/platform-orders/export?download=1');
         $res->assertOk();
 
         $content = $res->streamedContent();
diff --git a/tests/Feature/AdminPlatformOrderExportRefundStatusFilterTest.php b/tests/Feature/AdminPlatformOrderExportRefundStatusFilterTest.php
index cb517fe..a06c958 100644
--- a/tests/Feature/AdminPlatformOrderExportRefundStatusFilterTest.php
+++ b/tests/Feature/AdminPlatformOrderExportRefundStatusFilterTest.php
@@ -107,14 +107,14 @@ class AdminPlatformOrderExportRefundStatusFilterTest extends TestCase
             'meta' => [],
         ]);
 
-        $res1 = $this->get('/admin/platform-orders/export?refund_status=has');
+        $res1 = $this->get('/admin/platform-orders/export?download=1&refund_status=has');
         $res1->assertOk();
         $content1 = $res1->streamedContent();
         $this->assertStringContainsString('PO_EXPORT_REFUND_HAS_0001', $content1);
         $this->assertStringContainsString('PO_EXPORT_REFUND_HAS_0002', $content1);
         $this->assertStringNotContainsString('PO_EXPORT_REFUND_NONE_0003', $content1);
 
-        $res2 = $this->get('/admin/platform-orders/export?refund_status=none');
+        $res2 = $this->get('/admin/platform-orders/export?download=1&refund_status=none');
         $res2->assertOk();
         $content2 = $res2->streamedContent();
         $this->assertStringContainsString('PO_EXPORT_REFUND_NONE_0003', $content2);
diff --git a/tests/Feature/AdminPlatformOrderExportTest.php b/tests/Feature/AdminPlatformOrderExportTest.php
index 7f8c436..96d0cc9 100644
--- a/tests/Feature/AdminPlatformOrderExportTest.php
+++ b/tests/Feature/AdminPlatformOrderExportTest.php
@@ -112,7 +112,7 @@ class AdminPlatformOrderExportTest extends TestCase
             ],
         ]);
 
-        $res = $this->get('/admin/platform-orders/export');
+        $res = $this->get('/admin/platform-orders/export?download=1');
 
         $res->assertOk();
         $res->assertHeader('content-type', 'text/csv; charset=UTF-8');
@@ -131,14 +131,14 @@ class AdminPlatformOrderExportTest extends TestCase
         $this->assertStringContainsString('退款总额', $content);
 
         // include_meta=1 时应包含 meta(JSON) 列
-        $res2 = $this->get('/admin/platform-orders/export?include_meta=1');
+        $res2 = $this->get('/admin/platform-orders/export?download=1&include_meta=1');
         $res2->assertOk();
         $content2 = $res2->streamedContent();
         $this->assertStringContainsString('原始meta(JSON)', $content2);
         $this->assertStringContainsString('subscription_activation_error', $content2);
 
         // batch_synced_24h=1 导出应只包含 24h 内批量同步过的订单
-        $res3 = $this->get('/admin/platform-orders/export?batch_synced_24h=1');
+        $res3 = $this->get('/admin/platform-orders/export?download=1&batch_synced_24h=1');
         $res3->assertOk();
         $content3 = $res3->streamedContent();
         $this->assertStringContainsString('PO_EXPORT_BATCH_RECENT', $content3);
@@ -198,7 +198,7 @@ class AdminPlatformOrderExportTest extends TestCase
             'activated_at' => now(),
         ]);
 
-        $res4 = $this->get('/admin/platform-orders/export?site_subscription_id=' . $sub->id);
+        $res4 = $this->get('/admin/platform-orders/export?download=1&site_subscription_id=' . $sub->id);
         $res4->assertOk();
         $content4 = $res4->streamedContent();
         $this->assertStringContainsString('PO_EXPORT_SUB_FILTER_0001', $content4);