The application of vacuum coating technology in resin industry has greatly expanded its application in various fields. PVD can make resin products show good metal texture, improve the appearance and decoration of resin products. At the same time, due to the metallization effect, its electrical, thermal and corrosion resistance properties are also greatly improved, and the mechanical strength of its surface is improved. After the surface of resin products is coated with a certain metal film by vacuum coating, it will have the color of the metal, thus playing a surface decoration function, such as aluminum, chromium, brass, stainless steel, etc. have different colors. If the coating layer is aluminum, it can also be colored by coating or other methods to obtain various colors, and the decoration effect is very good.