Fatigue resistance on cast nickel-base superalloy K417 by laser shock processing(LSP) can be enhanced. Aluminizing is necessary in order to improve the oxidation resistance and fuel gas corrosion resistance. The impact of aluminizing on the LSP effects of K417 material is researched. According to the changes of residual stress in 900 ℃, although some of the residual compressive stress caused by LSP will be released, the experimental results show that the fatigue resistance of the sample by LSP is 285.5 MPa while that of the sample by alumetizing after LSP is 339.5 MPa. It is indicated that the LSP and the aluminizing can be used in the same process.