The wide application of coated steel sheets in the exterior decoration of home appliances stems from their excellent durability, elegant appearance and customized design flexibility. The coating layer not only enhances the corrosion resistance of the steel sheet and prolongs the service life of home appliances, but also meets the high requirements of modern home appliance design for appearance through a variety of colors, textures and gloss effects. Its strong scratch resistance and wear resistance enable home appliances to maintain a good appearance during long-term use. In addition, the lightness and processing convenience of coated steel sheets enable home appliance manufacturers to more efficiently produce various shapes of shells, further promoting its popularization and application in the field of home appliance exterior decoration.