The composite board of box house is a special glass wool sandwich board. The material is non combustible and has high melting point, which can reach the fire rating of class A. The unit weight of glass wool is 64kg / m3, the thermal conductivity can be less than or equal to 0.032w/m * k, and the sound insulation coefficient is greater than or equal to 30dB, which can effectively reduce the impact of noise, especially the indoor sound caused by the impact of rain, hail and other buildings