The machine is mainly used to cut natural rubber, synthetic rubber and other plastic materials, especially suitable to be installed near the rubber mixer to cut small piece of rubber. This machine is mainly a rubber knife, frame, cylinder, base, auxiliary table, hydraulic system, electrical system and other components, under the rubber knife is casted on the base to protect the rubber knife blade. When cutting raw rubber, artificial rubber on the bottom of the rubber knife, and then press the start button, rubber knife, driven by the piston rod slides along the rack cut down the rubber. Rack is equipped with upper and lower limit switches to control the valve to change direction of movement of the rubber knife, while also protecting cover of the cylinder.