Laser cladding repairing method for shaft parts

The shaft part laser cladding repair method comprises pretreatment, the pretreatment comprises cleaning and cutting, the cleaning is to remove an oxide layer and impurities on the surface of a to-be-repaired part, the cutting is to remove cracks and peripheral damaged parts of the to-be-repaired part to form a cut channel, and after the pretreatment, the to-be-repaired part is subjected to laser cladding. Metal powder is laid in the channels, laser cladding repairing is conducted on the cracks through high-energy laser beams, and a repaired surface is formed; laser annealing is conducted, specifically, the surface is repaired through laser irradiation, local laser annealing treatment is conducted on the repaired surface, and residual stress is removed; laser shock treatment is conducted on the repaired surface, residual stress is further removed, and the quality of the repaired surface is strengthened. Local annealing is adopted, so that a heat affected zone is small, and the service life of other parts of th