After the reform and opening up, the spraying equipment is a product of the environment where the development of industrial technology and automation are becoming more and more common. With the increasing degree of automation, products such as automatic electrostatic spray guns and other electrostatic spray gun equipment have become more and more popular, and the application of spraying production lines has become more and more extensive, and has penetrated into many areas of the national economy. According to the degree of automation, the spraying equipment on the market can be divided into three types: manual spraying equipment, semi-automatic spraying equipment and fully automatic spraying equipment.