Magnesium plate (commonly known as magnesium oxide plate) is made of ternary system of magnesium oxide, magnesium chloride, and water, and is configured and added with modifiers. Magnesium cementitious material with stable performance. As a reinforcing material, a new type of non-combustible decorative material compounded with a lightweight material as a filler. It is processed by special production technology and has the characteristics of fire resistance, waterproof, odorless, non-toxic, non-freezing, non-corrosive, non-crack, unchanged, non-combustible, high strength and light weight, convenient construction and long service life. There are special properties of compound.