Laser cladding technology is to use high energy laser beam (104-106w / cm2) to irradiation on the metal surface, synchronous melting, expansion and solidification, on the substrate surface with a layer of material with special physical, chemical or mechanical properties, thus forming a new dilution rate, very low alloy layer, compensate for the performance of the original substrate material, according to the product performance requirements, heat resistance, wear resistance, resistance, corrosion resistance, fatigue resistance or light, electric, magnetic properties of the surface layer. Laser cladding technology is a new technology with high benefit, which can prepare a high-performance alloy surface on the cheap metal substrate without affecting the essence of the matrix, reduce the cost, and save the precious and rare metal materials.