The production of wood pellet machine spare parts press roller skin includes casting - forging - rough turning - heat treatment - fine turning and other processes. The required characteristics of the roller skin for wood pellet machine spare parts are wear resistance and high stiffness. Because in the process of making pellet, the wood chips are squeezed into the ring die through the mutual extrusion and friction of the roller and the ring die, and the pellet are made into 3-5cm by the appropriate compression ratio. The casting of the press roll is made of No. 40 steel, which is wrought after cooling to increase the wear resistance of the press roller skin. It is then heat treated for 72 hours. Then according to the size of the roller skin, the inner diameter of 185mm, the outer diameter of 266mm, the height of 188mm requirements, through the lathe for finishing. After the complete work flow of the pellet machine spare parts of the roller skin service life of 300-500 working hours. If there is no complete process, the service life of the press roller skin is only 200-300 hour.