Foamed calcium silicate insulation material is a high-performance inorganic hard insulation material. It is made of silicate gelling materials, mineral admixtures and foaming agents through chemical foaming, autoclave curing and drying processes. It has a multi-layer pore structure and can effectively reduce heat transfer. Due to its excellent insulation performance, high temperature resistance, compressive strength and environmental protection characteristics, it is widely used in construction, industrial equipment and pipeline insulation.