The invention relates to the field of braking of new energy vehicles, in particular to a push-down emergency braking device and a braking method for new energy vehicles, including a base plate, a motor top plate, a mounting plate, a servo motor, a rotating shaft, etc.; the back side of the top surface of the base plate A motor top plate is fixedly installed, a mounting plate is fixedly installed in the middle of the base plate, a servo motor is fixedly installed on the rear side of the top surface of the base plate, the servo motor is located below the motor top plate, and a rotating shaft is arranged inside the servo motor. Through the cooperation of the first-level friction deceleration ring and the second-level friction deceleration ring, the first-level friction deceleration ring and the second-level friction deceleration ring are in contact with the fixed turntable to act as deceleration brakes, so that the fixed turntable and the rotating shaft decelerate and stop, and at the same time avoid The rotating shaft is worn, thereby increasing the service life of the servo motor.