Sandwich panels are used in large industrial plants, warehouses, gymnasiums, supermarkets, hospitals, cold storages, mobile rooms, building layers, clean workshops and places that require thermal insulation and fire prevention. The sandwich panel has beautiful appearance, bright color and good overall effect. It integrates load-bearing, thermal insulation, fire prevention and waterproofing, and does not require secondary decoration. It is a kind of widely used, especially for temporary facilities on construction sites such as offices and warehouses. , fences, etc., but also reflect the civilized construction of modern construction sites, especially in terms of rapid installation and use, in terms of assembling and dismounting, and the turnover and reuse index of materials, there are obvious advantages, which greatly reduces the cost of temporary facilities on construction sites. , will be an indispensable new lightweight building material.