As a product in the field of railway, rail transit connectors need to meet the requirements of high-speed, strong earthquake, high temperature and other working environments, mechanical and environmental performance requirements are obviously higher than consumer electronics, communications equipment and other fields of products. As the connector is installed in the external, so the plug-in to withstand the heat, vibration, salt and other harsh factors can play a normal function. High-speed signal connector has become the key part of telecommunication and data communication, which affects the signal transmission quality of the whole system. To ensure the high-speed and digital signal transmission of electrical connection, the integration of various signal transmission, miniaturization of product volume, modular combination, plug-and-pull convenience, from one-piece development to modular development. Can Be Different vehicle design parameters, to provide matching connector product design.