Moulds are generally used in compression or injection moulding of plastics, rubber, ceramics and other products. The Mould generally includes two parts: punch and concave die. Applying the inner cavity shape can make the blank obtain the corresponding three-dimensional shape. Moulds is a precise tool with complex shape, which requires high structural strength, stiffness, surface hardness, surface roughness and processing accuracy. The development level of die production is one of the important marks of the level of mechanical manufacturing.