Abstract: The coatings prepared by laser cladding has the advantages of low dilution, strong adhesion, small su rface roughness, smooth overall morphology, etc., and the dilution rate, phase, thickness, grain size, mechanical properties, etc. of the cladding layer can be self-controlled, which can meet the needs of specific environmental conditions of various industries.The coatings prepared by laser cladding includes corrosion resistance, high temperature resistance, wear resistance, oxidation resistance, self-lubricating properties and other characteristics of coatings, which can effectively repair damaged parts,improve their mechanical properties and extend their service life. The research status of laser cladding on the surface of ductile iron and gray cast iron were reviewed from the aspects of materials, process parameters and application background.