diff --git a/errors.go b/errors.go
new file mode 100644
index 0000000..2e4a028
--- /dev/null
+++ b/errors.go
@@ -0,0 +1,41 @@
+package xyshanghai
+
+import "fmt"
+
+// ErrorCode 定义错误码类型
+type ErrorCode int
+
+const (
+	// ErrCodeSuccess 成功
+	ErrCodeSuccess ErrorCode = 0
+	// ErrCodeFailure 失败
+	ErrCodeFailure ErrorCode = -1
+)
+
+// SDKError 自定义SDK错误
+type SDKError struct {
+	Code    ErrorCode
+	Message string
+	Err     error
+}
+
+func (e *SDKError) Error() string {
+	if e.Err != nil {
+		return fmt.Sprintf("code=%d, message=%s, err=%v", e.Code, e.Message, e.Err)
+	}
+	return fmt.Sprintf("code=%d, message=%s", e.Code, e.Message)
+}
+
+// Unwrap 返回内部错误
+func (e *SDKError) Unwrap() error {
+	return e.Err
+}
+
+// NewSDKError 创建SDK错误
+func NewSDKError(code ErrorCode, message string, err error) *SDKError {
+	return &SDKError{
+		Code:    code,
+		Message: message,
+		Err:     err,
+	}
+}
\ No newline at end of file