Corrosion-resistant thermal insulation board is a new type of thermal insulation material, made primarily from expanded vermiculite, featuring a unique flake-like layered structure, which is a characteristic not found in other thermal insulation materials. The layered structure of the flakes gives the corrosion-resistant vermiculite board high strength, low thermal conductivity, stable thermal stability, and is not prone to deformation or powdering, making it convenient for installation. It boasts advantages that ceramic fiber products and calcium silicate boards cannot match, and is the new generation of thermal insulation materials.