Vehicle-mounted multimode communication system and method suitable for rail transit

The invention relates to a vehicle-mounted multi-mode communication system and method suitable for rail transit, and the system comprises a multi-system vehicle-mounted module which is used for accessing different types of networks to form different transmission channels, thereby achieving the data transmission between a vehicle-mounted ATP device and a ground RBC device; and the multi-mode control module is used for realizing switching control of the vehicle-mounted ATP equipment among a plurality of transmission channels in the multi-system vehicle-mounted module based on a dynamic AHP algorithm so as to realize data transmission between the vehicle-mounted ATP equipment and the multi-system vehicle-mounted module. According to the invention, multiple wireless communication systems can be supported at the same time, integrated access of vehicle-mounted ATP equipment and vehicle-mounted wireless communication equipment of multiple systems can be realized through the vehicle-mounted multi-mode communication s