The surface treatment of plastic products mainly includes coating coating treatment and plating coating treatment. Generally, the crystallinity of plastics is large, the polarity is small or non-polar, and the surface energy is low, which will affect the adhesion of the coating. Since plastic is a non-conductive insulator, it is not possible to directly coat the plastic surface according to a general electroplating process specification. Therefore, before surface treatment, necessary pretreatment should be performed to improve the bonding force of the coating and the coating. The coating provides a conductive underlayer with good bonding.