diff --git a/core/backend/apps/products/tests.py b/core/backend/apps/products/tests.py
index c39ec45..c0da726 100644
--- a/core/backend/apps/products/tests.py
+++ b/core/backend/apps/products/tests.py
@@ -98,3 +98,37 @@ class ProductMaterialsTests(TestCase):
         self.assertEqual(len(data["project_packs"]), 1)
         self.assertEqual(data["project_packs"][0]["project_name"], "项目甲")
         self.assertEqual(len(data["project_packs"][0]["items"]), 2)  # 场景 + 视频素材
+
+
+class ProductImageDeleteGuardTests(TestCase):
+    """商品至少保留一张图:删到最后一张则拒绝(要清空只能删整个商品)。"""
+
+    def setUp(self):
+        from apps.assets.models import Asset, AssetFile
+        from .models import ProductImage
+
+        self.user = User.objects.create_user(username="idg", password="x")
+        self.team = Team.objects.create(name="IDG", owner=self.user)
+        TeamMember.objects.create(team=self.team, user=self.user, role=TeamMember.Role.OWNER)
+        self.client = APIClient()
+        self.client.force_authenticate(self.user)
+        self.product = Product.objects.create(team=self.team, created_by=self.user, title="P")
+
+        def mk_img(i):
+            a = Asset.objects.create(team=self.team, created_by=self.user, name=f"img{i}", asset_type="image", category="product_image")
+            AssetFile.objects.create(asset=a, object_key=f"k{i}", bucket="b", content_type="image/png", size_bytes=1, is_primary=True)
+            return ProductImage.objects.create(product=self.product, asset=a, sort_order=i, is_primary=(i == 0))
+
+        self.img0 = mk_img(0)
+        self.img1 = mk_img(1)
+
+    def test_delete_when_multiple_ok(self):
+        res = self.client.delete(f"/api/products/{self.product.id}/images/{self.img1.id}/")
+        self.assertEqual(res.status_code, 200)
+        self.assertEqual(self.product.images.count(), 1)
+
+    def test_delete_last_image_rejected(self):
+        self.client.delete(f"/api/products/{self.product.id}/images/{self.img1.id}/")  # 删到只剩一张
+        res = self.client.delete(f"/api/products/{self.product.id}/images/{self.img0.id}/")  # 再删最后一张
+        self.assertEqual(res.status_code, 400)
+        self.assertEqual(self.product.images.count(), 1)  # 没删掉,仍保留一张
diff --git a/core/backend/apps/products/views.py b/core/backend/apps/products/views.py
index 73e5817..8c34563 100644
--- a/core/backend/apps/products/views.py
+++ b/core/backend/apps/products/views.py
@@ -192,10 +192,16 @@ class ProductViewSet(TeamScopedViewSetMixin, ModelViewSet):
 
     @action(detail=True, methods=["delete"], url_path=r"images/(?P<image_id>[^/.]+)")
     def delete_image(self, request, pk=None, image_id=None):
-        """移除商品图(删 ProductImage 关联,保留底层 Asset)。"""
+        """移除商品图(删 ProductImage 关联,保留底层 Asset)。
+        商品至少保留一张图(与「创建必须带图」一致):删到最后一张则拒绝 —— 要清空只能删整个商品。"""
         product = self.get_object()
-        deleted, _ = ProductImage.objects.filter(product=product, id=image_id).delete()
-        if not deleted:
+        if not ProductImage.objects.filter(product=product, id=image_id).exists():
             return Response({"detail": "image not found"}, status=status.HTTP_404_NOT_FOUND)
+        if product.images.count() <= 1:
+            return Response(
+                {"detail": "商品至少保留一张图片,如需移除请删除整个商品(或先上传新图再删旧图)"},
+                status=status.HTTP_400_BAD_REQUEST,
+            )
+        ProductImage.objects.filter(product=product, id=image_id).delete()
         product.refresh_from_db()
         return Response(ProductSerializer(product).data, status=status.HTTP_200_OK)
diff --git a/core/frontend/src/product-detail-page.css b/core/frontend/src/product-detail-page.css
index 137aa10..cf97bb6 100644
--- a/core/frontend/src/product-detail-page.css
+++ b/core/frontend/src/product-detail-page.css
@@ -336,8 +336,9 @@
   .img-upload:hover { border-color: var(--heat); color: var(--heat); }
   .img-upload svg { width: 18px; height: 18px; }
   .ov-card.editing .img-upload { display: grid; }
-  .ov-card.editing .ov-images-sub .thumb { cursor: pointer; }
-  .ov-card.editing .ov-images-sub .thumb::after {
+  /* 编辑态:可删的图(有 ProductImage 关联)右上角显示删除 X;整块点击即删 */
+  .ov-card.editing .ov-images-sub .thumb.is-del { cursor: pointer; }
+  .ov-card.editing .ov-images-sub .thumb.is-del::after {
     content: '×';
     position: absolute;
     top: 4px; right: 4px;
@@ -348,7 +349,9 @@
     display: grid; place-items: center;
     font-size: 13px;
     line-height: 1;
+    pointer-events: none;
   }
+  .ov-card.editing .ov-images-sub .thumb.is-del:hover::after { background: var(--heat); }
   .ov-images-sub .thumb { position: relative; }
   .pd-overview .ov-h {
     display: flex; align-items: baseline; gap: 8px;
diff --git a/core/frontend/src/routes/products.tsx b/core/frontend/src/routes/products.tsx
index cbe4c96..e226d6b 100644
--- a/core/frontend/src/routes/products.tsx
+++ b/core/frontend/src/routes/products.tsx
@@ -738,11 +738,15 @@ export function ProductDetailPage({ product, projects, initialTab = "assets", na
 
   // 商品图网格 · 用后端内嵌的 preview_url(images[].preview_url / cover_preview_url),不再反查全局 assets
   const imageRefs = [...(product.images || [])].sort((a, b) => a.sort_order - b.sort_order);
-  const productImages: Array<{ id: string; url: string }> = [];
+  // imageId = ProductImage.id(删除接口要的就是它,不是 asset id);封面若无对应 ProductImage
+  // (如三视图采用为封面)则只展示、不可删(删除走 ProductImage 关联)。
+  const productImages: Array<{ key: string; url: string; imageId?: string }> = [];
   if (product.cover_asset && !imageRefs.some((ref) => ref.asset === product.cover_asset)) {
-    productImages.push({ id: product.cover_asset, url: product.cover_preview_url || "" });
+    productImages.push({ key: product.cover_asset, url: product.cover_preview_url || "" });
   }
-  for (const ref of imageRefs) productImages.push({ id: ref.asset, url: ref.preview_url || "" });
+  for (const ref of imageRefs) productImages.push({ key: ref.id, url: ref.preview_url || "", imageId: ref.id });
+  // 可删的图(有 ProductImage 关联)数量:只剩一张时锁住最后一张,不允许删到没图
+  const deletableImageCount = productImages.filter((im) => im.imageId).length;
 
   // AI 生成素材 · 服务端已按 ?product 把「该商品」的素材(metadata.product_id / origin_task→project→product /
   // ProductImage 关联)懒加载到 productAssets;这里只按可显示的图片类型过滤。
@@ -981,17 +985,24 @@ export function ProductDetailPage({ product, projects, initialTab = "assets", na
                 <span className="ct">({productImages.length})</span>
               </div>
               <div className="grid" id="ov-images-grid">
-                {productImages.map((image) => (
-                  image.url ? (
-                    <div className="thumb placeholder" key={image.id} role="button" tabIndex={0} title="点击放大" style={{ cursor: "zoom-in" }} onClick={() => setPreview({ src: image.url, name: realName })} onKeyDown={(event) => { if (event.key === "Enter" || event.key === " ") { event.preventDefault(); setPreview({ src: image.url, name: realName }); } }}>
-                      <img src={image.url} alt={realName} loading="lazy" />
+                {productImages.map((image) => {
+                  // 商品至少保留一张图:只剩一张可删图时,那张不显示叉子、不可删(要移除请删整个商品)
+                  const canDelete = editing && Boolean(image.imageId) && deletableImageCount > 1;
+                  const lastLocked = editing && Boolean(image.imageId) && deletableImageCount <= 1;
+                  const onThumb = () => {
+                    if (canDelete) void onDeleteImage?.(image.imageId as string);
+                    else if (image.url) setPreview({ src: image.url, name: realName });
+                  };
+                  return (
+                    <div className={`thumb placeholder${canDelete ? " is-del" : ""}${lastLocked ? " is-locked" : ""}`} key={image.key} role="button" tabIndex={0}
+                      title={canDelete ? "点击移除该图" : lastLocked ? "商品至少保留一张图;要移除请删除整个商品" : image.url ? "点击放大" : undefined}
+                      style={{ cursor: canDelete ? "pointer" : image.url ? "zoom-in" : "default" }}
+                      onClick={onThumb}
+                      onKeyDown={(event) => { if (event.key === "Enter" || event.key === " ") { event.preventDefault(); onThumb(); } }}>
+                      {image.url ? <img src={image.url} alt={realName} loading="lazy" /> : <span className="ph-frame">1:1</span>}
                     </div>
-                  ) : (
-                    <div className="thumb placeholder" key={image.id}>
-                      <span className="ph-frame">1:1</span>
-                    </div>
-                  )
-                ))}
+                  );
+                })}
                 <div className="img-upload" id="ov-img-add" title="上传图片" role="button" tabIndex={0} onClick={() => imgInputRef.current?.click()} onKeyDown={(event) => { if (event.key === "Enter" || event.key === " ") { event.preventDefault(); imgInputRef.current?.click(); } }}>
                   {uploading ? (
                     <span className="ph-frame" style={{ fontSize: 12 }}>上传中…</span>