Phenolic composite insulation board is made of double-sided aluminum foil or color steel and phenolic foam through advanced continuous production line in a sandwich structure. The aluminum foil or color steel is embossed, and its appearance is oxidation resistant and corrosion resistant. The phenolic foam insulation layer in the middle uses advanced mixing and foaming processes. The aluminum foil or color steel has high bonding strength with the core material, fine foam holes, uniform density, high strength, low thermal conductivity, and good thermal insulation performance. It is widely used in subway, airport supermarkets, warehouses, pharmaceutical factory clean workshops, large sports venues, exhibition halls, hospitals Construction of central air conditioning and ventilation systems for hotels and high-rise buildings.