Frame relay switching is a new switching technology in data switching . mainly we probed into the system structure and frame format of frame relay switching and data communication in this paper 帧中继交换是计算机网络数据交换中的一种高新交换技术,本文主要探讨了帧中继交换技术的体系结构和帧格式,重点介绍了它的数据传输方式。