In the process of laser cladding£¬ all kinds of defects or deficiencies on the repairing surface will be causedbecause of the process parameters£¬ equipment performance£¬ cladding powder and other reasons£¬ in which the surface topographyof cladding layer will be influenced by the liquidity of powder in the bath directly£® In addition£¬ the presence of oxygen will lead to the morphology of spiracle in the surface of cladding layer in the cladding process£® Analysis through the experiments shows: the liquidity of powder-pool will increase effectively by adding right amount Al powder in the laser cladding process£® Simultaneously£¬Al2O3 generated from the combination of Al and O will protect the surface of the cladding layer and does not reduce the hardness£® When the quality score of 1% of Al powder is added in the YG12£¬ cladding layer£¬ the hardness increases£¬ and proportion is appropriate£®