Laser cladding technology is the use of high-energy laser beam (104-106w/cm2) irradiation of the metal surface, simultaneous melting, expansion and solidification, the substrate surface plated with a layer of materials with special physical, chemical or mechanical properties, so as to form a new layer of alloy with a very low dilution rate, to compensate for the performance of the original substrate material, according to the requirements of the performance of the product, to obtain the heat-resistant, abrasion-resistant, resistance to electricity, corrosion, fatigue or optical, electrical and magnetic properties of the surface layer.