The base board of arida inorganic precoated board is high density non asbestos fiber reinforced calcium silicate board with environmental protection coating on the surface. It is fireproof, light and beautiful, environmental friendly, easy to clean, corrosion resistant and easy to process. Various colors and specifications can be customized. The utility model can be used for the interior wall decoration of public spaces such as hospitals, tunnels, subways, schools, laboratories, etc.