Composite silicate board is a high-quality and efficient thermal insulation material integrating closed microporous structure and reticular fiber structure. Within the temperature range of use, it can be used for a long time, not easy to age, not deteriorate, non-toxic and tasteless, and the heat preservation performance will not decrease for a long time. It has the characteristics of light weight, small thermal conductivity, cold insulation, heat insulation, shockproof, sound absorption, etc. It can be widely used in metallurgy, chemical industry, petroleum, shipbuilding, textile, medicine, transportation, thermoelectricity, construction and other industries. It is compatible with other thermal insulation materials. It has the characteristics of light weight, convenient construction, can be cut at will, packaged according to the shape, does not pollute the environment, does not stimulate the skin, and has no loss in construction. Composite silicate board can be divided into two categories: waterproof type and ordinary type.