Langhui autoclaved aerated coagulation board fire prevention board is composed of non-combustible inorganic material, and the thermal conductivity is small, which makes the heat migration is slow, can effectively resist the fire, and to protect its structure from the effects of fire, the fire-resistant limit of more than 4 hours, and replace the original use of fire-resistant coatings, which strengthens the strength of the surface and saves the cost of construction, construction is convenient and easy to install.