diff --git a/xy_sh/errors.go b/xy_sh/errors.go
new file mode 100644
index 0000000..5563d9a
--- /dev/null
+++ b/xy_sh/errors.go
@@ -0,0 +1,55 @@
+package xy_sh
+
+import "fmt"
+
+// ErrorCode 定义错误码类型
+type ErrorCode int
+
+const (
+	// ErrCodeSuccess 请求成功
+	ErrCodeSuccess ErrorCode = 0
+	// ErrCodeFail 请求失败
+	ErrCodeFail ErrorCode = -1
+)
+
+// SDKError SDK自定义错误
+type SDKError struct {
+	Code    ErrorCode
+	Message string
+	Err     error
+}
+
+func (e *SDKError) Error() string {
+	if e.Err != nil {
+		return fmt.Sprintf("[%d] %s: %v", e.Code, e.Message, e.Err)
+	}
+	return fmt.Sprintf("[%d] %s", e.Code, e.Message)
+}
+
+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,
+	}
+}
+
+var (
+	// ErrInvalidConfig 无效配置
+	ErrInvalidConfig = NewSDKError(ErrCodeFail, "无效配置", nil)
+	// ErrEncryptFailed 加密失败
+	ErrEncryptFailed = NewSDKError(ErrCodeFail, "加密失败", nil)
+	// ErrDecryptFailed 解密失败
+	ErrDecryptFailed = NewSDKError(ErrCodeFail, "解密失败", nil)
+	// ErrSignFailed 签名失败
+	ErrSignFailed = NewSDKError(ErrCodeFail, "签名失败", nil)
+	// ErrRequestFailed 请求失败
+	ErrRequestFailed = NewSDKError(ErrCodeFail, "请求失败", nil)
+	// ErrResponseParseFailed 响应解析失败
+	ErrResponseParseFailed = NewSDKError(ErrCodeFail, "响应解析失败", nil)
+)
\ No newline at end of file