diff --git a/sdk_LinkedMall/errors.go b/sdk_LinkedMall/errors.go
new file mode 100644
index 0000000..8ad50f2
--- /dev/null
+++ b/sdk_LinkedMall/errors.go
@@ -0,0 +1,45 @@
+package sdk_LinkedMall
+
+import "fmt"
+
+// APIError 表示API返回的业务错误
+type APIError struct {
+	Code       string `json:"Code"`       // 错误码
+	Message    string `json:"Message"`    // 错误信息
+	SubCode    string `json:"SubCode"`    // 子错误码
+	SubMessage string `json:"SubMessage"` // 子错误信息
+	RequestId  string `json:"RequestId"`  // 请求ID
+}
+
+func (e *APIError) Error() string {
+	return fmt.Sprintf("linkedmall API error: code=%s, message=%s, subCode=%s, subMessage=%s, requestId=%s",
+		e.Code, e.Message, e.SubCode, e.SubMessage, e.RequestId)
+}
+
+// IsSuccess 判断是否业务成功
+func (e *APIError) IsSuccess() bool {
+	return e.Code == "SUCCESS"
+}
+
+// 预定义错误码常量
+const (
+	ErrCodeShopTypeInvalid              = "ShopTypeInvalid"
+	ErrCodeSkuPriceNotLatest            = "SkuPriceUnique"
+	ErrCodePurchaseOrderNotFound        = "PurchaseOrderNotFound"
+	ErrCodeRefundNumberExceed           = "RefundNumberMustLessThanOrder"
+	ErrCodeRefundAmountExceed           = "RefundAmountMustLessThanOrder"
+	ErrCodeNoPrivilege                  = "HasNoPrivilege"
+	ErrCodeOrderNotFound                = "OrderNotFound"
+	ErrCodeShopNotFound                 = "ShopNotFind"
+	ErrCodeSavePurchaseOrderError       = "SavePurchaseOrderError"
+	ErrCodeOuterPurchaseOrderIdExist    = "OuterPurchaseOrderIdExist"
+)
+
+// ErrResp 用于解析错误响应
+type ErrResp struct {
+	Code       string `json:"Code"`
+	Message    string `json:"Message"`
+	SubCode    string `json:"SubCode"`
+	SubMessage string `json:"SubMessage"`
+	RequestId  string `json:"RequestId"`
+}
\ No newline at end of file