In order to solve the problem of serious surface wear and difficulty in repairing during the maintenance process aiming the wear failure of the reducer shaft surface, laser cladding technology was used to remanufacture the worn reducer shaft surface. The effect of laser cladding on the metallographic microstructure, hardness, wear resistance and corrosion resistance of the reducer shaft surface was studied. The research results show that after the reducer shaft is remanufactured by laser cladding, the surface cladding layer has a fine and dense structure, and the properties of the cladding layer are significantly improved. The wear resistance and corrosion resistance are about 2.5 times and 2 times that of the reducer shaft base material, respectively. The laser cladding technology has broad application prospects in the remanufacturing of the reducer shaft.