The invention discloses a punching machine which comprises a frame and a punching mechanism arranged on the frame. The punching mechanism comprises a base plate, a drive cylinder arranged on the base plate and a punching block used for driving an upper die of the punching machine to work. A sliding rail is arranged on the base plate, the punching block and the sliding rail form a sliding pair, a cylinder body of the drive cylinder is hinged to the base plate, and a piston rod of the drive cylinder is connected with the punching block through a force and frequency increasing mechanism. The force and frequency increasing mechanism comprises an upper force increasing arm and a lower force increasing arm. The upper end of the upper force increasing arm is hinged to the base plate. The lower end of the upper force increasing arm, the upper end of the lower force increasing arm and the tail end of the piston rod are hinged together through the same hinge shaft. The lower end of the lower force increasing arm is hinged to the punching block. The punching machine effectively solves the problems that in the prior art, a pneumatic punching mechanism is small in punching force, the punching speed is low and the punching stroke can not be accurately controlled. The punching machine is simple in structure, low in device investment and high in punching speed, has a function of slotting two faces of a batten and has high practical value.