The invention relates to a method and a device for braking by pushing a brake pedal main beam with an opposite force. The device mainly comprises a motor, a gear, a main frame, a toothed treadle bar, a limit screw, a support frame, springs, a fixing plate and a lever, wherein an installation hole and a shaft hole are formed on the fixing plate; the gear is sleeved on a shaft of the motor; the limit screw is arranged at the front end of the toothed treadle bar; the support frame is a U-shaped frame; the main frame is in a square shape, a rectangular through hole is formed on the middle part ofthe main frame, a positioning screw hole is formed on the lateral surface of the main frame, the toothed treadle bar is arranged in the rectangular through hole, the lower part of the toothed treadlebar is supported by the support frame, the springs are arranged in connection circular holes at both ends below the support frame. the main frame is in butt joint with the motor and is screwed and fixed by a bolt, and the main frame and the motor are fixed on the fixing plate by screws; the lever consists of an upper lever and a lower lever, a groove is formed on one side of the upper part, a square hole is formed on the middle part, and a bending hook is arranged at the lower end; and the lever is arranged on both sides of the shaft hole of the fixing plate, the square hole and the shaft hole are aligned, and a rotating shaft is inserted into the holes and is screwed and fixed by the screws.