diff --git a/resources/views/admin/platform_orders/index.blade.php b/resources/views/admin/platform_orders/index.blade.php
index eedc065..489df73 100644
--- a/resources/views/admin/platform_orders/index.blade.php
+++ b/resources/views/admin/platform_orders/index.blade.php
@@ -738,7 +738,7 @@
         @forelse($orders as $order)
             <tr>
                 <td>{{ $order->id }}</td>
-                <td><a href="/admin/platform-orders/{{ $order->id }}">{{ $order->order_no }}</a></td>
+                <td><a href="/admin/platform-orders/{{ $order->id }}?back={{ urlencode(request()->getRequestUri()) }}">{{ $order->order_no }}</a></td>
                 <td>
                     @if($order->merchant)
                         <a href="{!! request()->fullUrlWithQuery(['merchant_id' => $order->merchant->id, 'page' => null]) !!}" class="link">{{ $order->merchant->name }}</a>
diff --git a/resources/views/admin/platform_orders/show.blade.php b/resources/views/admin/platform_orders/show.blade.php
index c89b19d..9089f0f 100644
--- a/resources/views/admin/platform_orders/show.blade.php
+++ b/resources/views/admin/platform_orders/show.blade.php
@@ -544,6 +544,16 @@
 </div>
 
 <div class="mb-20" style="margin-top:16px;">
+    @php
+        $back = (string) request()->query('back', '');
+        $safeBack = str_starts_with($back, '/') ? $back : '';
+    @endphp
+
+    @if($safeBack)
+        <a href="{{ $safeBack }}" class="muted">← 返回上一页（保留上下文）</a>
+        <span class="muted">｜</span>
+    @endif
+
     <a href="/admin/platform-orders">← 返回平台订单列表</a>
 </div>
 @endsection
diff --git a/tests/Feature/AdminPlatformOrderIndexOrderNoLinkWithBackTest.php b/tests/Feature/AdminPlatformOrderIndexOrderNoLinkWithBackTest.php
new file mode 100644
index 0000000..dd85eaf
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderIndexOrderNoLinkWithBackTest.php
@@ -0,0 +1,62 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderIndexOrderNoLinkWithBackTest 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_order_no_link_in_index_contains_back_param(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = \App\Models\Merchant::query()->firstOrFail();
+        $plan = \App\Models\Plan::query()->create([
+            'code' => 'po_index_back_plan_01',
+            'name' => '平台订单列表 back 参数测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $order = \App\Models\PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_INDEX_BACK_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' => 10,
+            'paid_amount' => 0,
+            'placed_at' => now(),
+            'meta' => [],
+        ]);
+
+        // index 页应存在该订单行链接，且链接带 back（保留筛选上下文）
+        $res = $this->get('/admin/platform-orders?status=pending');
+        $res->assertOk();
+
+        $expectedBack = urlencode('/admin/platform-orders?status=pending');
+        $res->assertSee('/admin/platform-orders/' . $order->id . '?back=' . $expectedBack, false);
+    }
+}
diff --git a/tests/Feature/AdminPlatformOrderShowBackLinkTest.php b/tests/Feature/AdminPlatformOrderShowBackLinkTest.php
new file mode 100644
index 0000000..9078128
--- /dev/null
+++ b/tests/Feature/AdminPlatformOrderShowBackLinkTest.php
@@ -0,0 +1,102 @@
+<?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 AdminPlatformOrderShowBackLinkTest 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_page_renders_safe_back_link_when_back_query_present(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'po_show_back_link_plan',
+            'name' => '平台订单详情返回链接测试套餐',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_SHOW_BACK_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' => 10,
+            'paid_amount' => 0,
+            'placed_at' => now(),
+            'meta' => [],
+        ]);
+
+        $back = '/admin/platform-orders?status=pending';
+        $this->get('/admin/platform-orders/' . $order->id . '?back=' . urlencode($back))
+            ->assertOk()
+            ->assertSee('返回上一页（保留上下文）')
+            ->assertSee($back, false);
+    }
+
+    public function test_show_page_does_not_render_back_link_when_back_is_not_relative_path(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $merchant = Merchant::query()->firstOrFail();
+        $plan = Plan::query()->create([
+            'code' => 'po_show_back_link_plan2',
+            'name' => '平台订单详情返回链接测试套餐2',
+            'billing_cycle' => 'monthly',
+            'price' => 10,
+            'list_price' => 10,
+            'status' => 'active',
+            'sort' => 10,
+            'published_at' => now(),
+        ]);
+
+        $order = PlatformOrder::query()->create([
+            'merchant_id' => $merchant->id,
+            'plan_id' => $plan->id,
+            'order_no' => 'PO_SHOW_BACK_0002',
+            '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' => 10,
+            'paid_amount' => 0,
+            'placed_at' => now(),
+            'meta' => [],
+        ]);
+
+        $this->get('/admin/platform-orders/' . $order->id . '?back=https://evil.example.com')
+            ->assertOk()
+            ->assertDontSee('返回上一页（保留上下文）');
+    }
+}