Metal composite plate refers to a layer of metal plate covered with another metal plate to achieve the effect of saving resources and reducing costs without reducing the use effect (corrosion resistance, mechanical strength, etc.). Generally, there are explosive compounding, explosive rolling compounding, rolling compounding and so on. Composite materials can be divided into composite plates, composite tubes, composite rods, etc. It is mainly used in anti-corrosion, pressure vessel manufacturing, electric construction, petrochemical, medicine, light industry, automobile and other industries.