The coated steel plate is processed on the home appliance and construction metal plate through multiple processes to show a variety of different appearance textures, and then the corrosive effect is enhanced by the transparent primer coating, which can meet the requirement of salt spray 240h. The use of different lines of wire drawing effect on the primer makes the appearance more solemn, and the surface is covered with a transparent protective film, so that it not only has a beautiful color, but also plays a protective role. This multi-layer structure makes the overall color more transparent and the texture more three-dimensional, and has been successfully used in refrigerators, water heaters, televisions and other fields.