Brake Booster is an innovative design for automobile braking and driving. The purpose of the invention is to provide a driving force in real time when the motor vehicle's kinetic energy is in the form of a spring in the energy of the vehicle when the brake is driven by a multiple-disc spring. The characteristic is that the spokes are fixed with a flywheel, the brake ratchet puller can pull the movable brake ratchet and the flywheel, the spur of the adjacent spring external fixing cylinder is occlusal; the outside of the spring external fixing cylinder has a ratchet, a ball chute and a heavy ball on the housing of the brake body, and the bearing is relative; the outer side of the disc spring is fixed on the inside of the spring external fixing cylinder. The medial end is fixed on the same spring internal fixing cylinder; the outer side has the ratchet tooth trough to be opposite with the fixed pawl, the reversing tooth ring respectively, the fixed pawl and the throttle correlation link has the throttle to assist the correlation switch, the reversing tooth ring and the wheel axle power flywheel phase occlusal can break the bite under the reversing top lever action. The purpose of this paper is to store the kinetic energy of the vehicle in the form of the potential energy of the spring by using a large number of special-shaped plane vortex coil springs. The potential energy stored in the vehicle can be released in real time to provide driving power, and it is simple, safe and effective to use the combination of the traditional drum brake to ensure the braking and the booster. The device has the characteristics of mixing power, green environmental protection, economic urban traffic energy-saving effect is outstanding, can effectively reduce the starting motor, engine, clutch wear!