diff --git a/app/Endpoint/Api/Http/Controllers/Product/ProductSkuController.php b/app/Endpoint/Api/Http/Controllers/Product/ProductSkuController.php
index 54e268d1..ee87a03a 100644
--- a/app/Endpoint/Api/Http/Controllers/Product/ProductSkuController.php
+++ b/app/Endpoint/Api/Http/Controllers/Product/ProductSkuController.php
@@ -43,7 +43,7 @@ class ProductSkuController extends Controller
     {
         $user = $request->user();
 
-        $sku = ProductSku::findOrFail($id);
+        $sku = ProductSku::with('buynote')->findOrFail($id);
 
         // 是否收藏商品
         $isCollected = (bool) $user?->skuFavorites()->where('sku_id', $sku->id)->exists();
diff --git a/app/Endpoint/Api/Http/Resources/ProductSku/ProduckSkuResource.php b/app/Endpoint/Api/Http/Resources/ProductSku/ProduckSkuResource.php
index f58cd1fb..cdb9faa9 100644
--- a/app/Endpoint/Api/Http/Resources/ProductSku/ProduckSkuResource.php
+++ b/app/Endpoint/Api/Http/Resources/ProductSku/ProduckSkuResource.php
@@ -29,6 +29,9 @@ class ProduckSkuResource extends JsonResource
             'stock' => $this->saleable_stock,
             'weight' => (int) $this->weight,
             'is_online' => $this->isOnline(),
+            'buynote' => (string) $this->when($this->relationLoaded('buynote'), function () {
+                return $this->buynote?->content;
+            }),
         ];
     }
 }
diff --git a/app/Models/ProductSku.php b/app/Models/ProductSku.php
index ea9ddd1e..464a4a35 100644
--- a/app/Models/ProductSku.php
+++ b/app/Models/ProductSku.php
@@ -98,6 +98,14 @@ class ProductSku extends Model
         return $this->hasMany(ProductGift::class, 'sku_id');
     }
 
+    /**
+     * 此商品的购买须知
+     */
+    public function buynote()
+    {
+        return $this->belongsTo(ProductBuynote::class, 'buynote_id');
+    }
+
     /**
      * 确认此商品是否已上架
      *