Sandwich panels are used in large industrial plants, warehouses, stadiums, supermarkets, hospitals, cold storage, mobile homes, building plus floors, clean workshops and places where insulation and fire protection are required. The sandwich panel has beautiful appearance, bright color and good overall effect. It integrates load-bearing, heat preservation, fireproof and waterproof, and does not require secondary decoration. It is a kind of versatile, especially in temporary facilities such as offices and warehouses for construction sites. , the wall, etc., more embodies the civilized construction of modern construction sites, especially in terms of rapid installation and use, there are obvious advantages in the detachable and recyclable index of materials that can be installed, and the temporary facilities cost of construction sites is greatly reduced.