diff --git a/app/Http/Controllers/Admin/PlanController.php b/app/Http/Controllers/Admin/PlanController.php
index 6497714..0f59fde 100644
--- a/app/Http/Controllers/Admin/PlanController.php
+++ b/app/Http/Controllers/Admin/PlanController.php
@@ -228,6 +228,49 @@ class PlanController extends Controller
             });
     }
 
+    public function seedDefaults(Request $request): RedirectResponse
+    {
+        $this->ensurePlatformAdmin($request);
+
+        // 安全护栏：仅当当前库没有任何套餐时才允许一键初始化
+        $existingCount = Plan::query()->count();
+        if ($existingCount > 0) {
+            return redirect()->back()->with('error', '当前已有套餐（' . $existingCount . ' 条），为避免污染运营数据，已阻止一键初始化。');
+        }
+
+        $now = now();
+        $defaults = [
+            [
+                'code' => 'starter_monthly',
+                'name' => '基础版（月付）',
+                'billing_cycle' => 'monthly',
+                'price' => 99,
+                'list_price' => 129,
+                'status' => 'active',
+                'sort' => 10,
+                'description' => '适合刚开站的试运营阶段，可用于 Demo 场景。',
+                'published_at' => $now,
+            ],
+            [
+                'code' => 'pro_yearly',
+                'name' => '专业版（年付）',
+                'billing_cycle' => 'yearly',
+                'price' => 1999,
+                'list_price' => 2599,
+                'status' => 'active',
+                'sort' => 20,
+                'description' => '面向成长型站点，后续搭配授权项配置。',
+                'published_at' => $now,
+            ],
+        ];
+
+        foreach ($defaults as $row) {
+            Plan::query()->create($row);
+        }
+
+        return redirect('/admin/plans')->with('success', '已初始化默认套餐：' . count($defaults) . ' 条。');
+    }
+
     protected function statusLabels(): array
     {
         return [
diff --git a/resources/views/admin/plans/index.blade.php b/resources/views/admin/plans/index.blade.php
index 7f882cb..365c08b 100644
--- a/resources/views/admin/plans/index.blade.php
+++ b/resources/views/admin/plans/index.blade.php
@@ -11,13 +11,21 @@
 
 <div class="card mb-20">
     <h3>工具</h3>
-    <form method="get" action="/admin/plans/export">
-        <input type="hidden" name="status" value="{{ $filters['status'] ?? '' }}">
-        <input type="hidden" name="published" value="{{ $filters['published'] ?? '' }}">
-        <input type="hidden" name="billing_cycle" value="{{ $filters['billing_cycle'] ?? '' }}">
-        <input type="hidden" name="keyword" value="{{ $filters['keyword'] ?? '' }}">
-        <button type="submit">导出当前筛选结果（CSV）</button>
-    </form>
+    <div class="grid-2">
+        <form method="get" action="/admin/plans/export">
+            <input type="hidden" name="status" value="{{ $filters['status'] ?? '' }}">
+            <input type="hidden" name="published" value="{{ $filters['published'] ?? '' }}">
+            <input type="hidden" name="billing_cycle" value="{{ $filters['billing_cycle'] ?? '' }}">
+            <input type="hidden" name="keyword" value="{{ $filters['keyword'] ?? '' }}">
+            <button type="submit">导出当前筛选结果（CSV）</button>
+        </form>
+
+        <form method="post" action="/admin/plans/seed-defaults" onsubmit="return confirm('仅在当前没有任何套餐时才会初始化。确认执行吗？');">
+            @csrf
+            <button type="submit" class="btn">一键初始化默认套餐（空库）</button>
+            <div class="muted muted-xs" style="margin-top:6px;">安全护栏：当库中已存在套餐时会自动阻止，避免污染运营数据。</div>
+        </form>
+    </div>
 </div>
 
 <div class="card mb-20">
diff --git a/routes/web.php b/routes/web.php
index a963b83..3c9e725 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -121,6 +121,8 @@ Route::prefix('admin')->group(function () {
         Route::get('/plans/export', [PlanController::class, 'export']);
         Route::get('/plans/create', [PlanController::class, 'create']);
         Route::post('/plans', [PlanController::class, 'store']);
+        // 注意：必须放在 /plans/{plan} 之前，避免被参数路由吞掉导致 404
+        Route::post('/plans/seed-defaults', [PlanController::class, 'seedDefaults']);
         Route::get('/plans/{plan}/edit', [PlanController::class, 'edit']);
         Route::post('/plans/{plan}', [PlanController::class, 'update']);
         Route::post('/plans/{plan}/set-status', [PlanController::class, 'setStatus']);
diff --git a/tests/Feature/AdminPlanSeedDefaultsTest.php b/tests/Feature/AdminPlanSeedDefaultsTest.php
new file mode 100644
index 0000000..3cc05a6
--- /dev/null
+++ b/tests/Feature/AdminPlanSeedDefaultsTest.php
@@ -0,0 +1,58 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Models\Plan;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlanSeedDefaultsTest 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_platform_admin_can_seed_default_plans_when_empty(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        // 清空 seed 带来的默认套餐（测试口径：模拟空库）
+        Plan::query()->delete();
+        $this->assertSame(0, Plan::query()->count());
+
+        $this->post('/admin/plans/seed-defaults')
+            ->assertRedirect('/admin/plans');
+
+        $this->assertSame(2, Plan::query()->count());
+        $this->assertNotNull(Plan::query()->where('code', 'starter_monthly')->first());
+        $this->assertNotNull(Plan::query()->where('code', 'pro_yearly')->first());
+
+        $this->get('/admin/plans')
+            ->assertOk()
+            ->assertSee('基础版（月付）')
+            ->assertSee('专业版（年付）');
+    }
+
+    public function test_seed_default_plans_is_blocked_when_plans_exist(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $this->assertTrue(Plan::query()->count() > 0);
+
+        $this->post('/admin/plans/seed-defaults')
+            ->assertRedirect();
+
+        // 不应新增到 2 条以上；且仍能打开列表
+        $this->get('/admin/plans')
+            ->assertOk()
+            ->assertSee('套餐管理');
+    }
+}