Automatic connection method and apparatus between an automobile diagnostic device and a VCI device

The present invention provides an apparatus for automatic connection between an automobile diagnostic device and a VCI device and a method for the automatic connection. The method includes the steps of: periodically connecting the VCI device with at least one of a plurality of connection modes in pre-stored connection records when the automobile diagnostic device is started; and, when successfully connecting the VCI device with a successful connection mode, communicating with the VCI device with the successful connection mode. The method and apparatus according to this invention significantly improve the operation efficiency and user experience of the automobile diagnostic device.