The coated steel wallboard has excellent stability, long service life, water resistance, moisture resistance, heat resistance, weather resistance, drug resistance, abrasion resistance, impact resistance, easy cleaning and maintenance characteristics. Therefore, the wallboard has a wide range of applications, and is widely used in indoor hotel lobbies, office buildings, machine rooms, elevator rooms, etc. The simple steel wallboard is fixed with steel keel, and the steel wallboard is more durable and solid than the aluminum wallboard in the past.