Color steel sandwich panel, also known as color steel composite panel, is a new type of building material composed of two layers of color-coated steel plates and an inner layer of insulation materials such as polystyrene, polyurethane, or rock wool, bonded together under high temperature and pressure. It features lightweight, high strength, thermal insulation, moisture resistance, and fireproofing, making it widely used in industrial plants, warehouses, cold storage facilities, prefabricated rooms, and other building structures.