The invention relates to a vehicle braking energy recycling reducing method and relative system, which uses the braking energy of vehicle reducer to generate power. The braking generator of reducer is serially connected between the gear-box and the first transmission axle; the braking generator contains an electromotor, which is connected to an electrical transformation device; the electrical transformation device is connected to the loads. The braking generator of reducer uses the braking torque generated by the vehicle to drive the electromotor to generate electricity. The invention can transform the braking energy into electricity to be stored and utilized. The invention has the advantages that simple structure, quick response, and easy installment, which especially provides the alternative power driving method. |