Coated steel plates are used a lot on partition walls, partition panels, and indoor walls, especially in chemical plants, hospitals, purification workshops, etc., all of which are uniformly selected as wallboard materials. The metal steel plate and the film have good ductility, and can be directly processed by stamping, stretching, bending and other hardware, and can also be directly stretched into steel-wood door panels. Therefore, many fire doors and garage doors use film-coated panels.