Abstract: Based on urban rail transit vehicle braking system data transmission, technical strategies adopted for problems at each joint are elaborated, building data collection foundation for intelligent operation and maintenance. Transmission of vehicle-wayside wireless communication includes technical joints of onboard maintenance system terminal data collection, data wireless transmission, ground data center data analysis and storage. Targeting the problems in weak signal and data density in data wireless transmission, solutions for stretching data transmission time interval to second level through reasonable data array are proposed. Ground data center is suggested to accomplish data analysis and storage through data analytical subsystem according to information including relevant lines, vehicle encoding and equipment.