本文阐述了CAN(Controller Area Network)总线协议及其技术特点。结合应用实例，文中分析了CAN总线技术在汽车中的应用优势，并列举了应用中的关键技术。文中给出了Scania卡车基于CAN的控制体系。-This paper describes the CAN (Controller Area Network) bus protocol and its technical characteristics. Combined application examples, the article analyzes the CAN bus technology in the automotive application of advantages, and cited the application of key technologies. The text is based on the Scania truck CAN control system.