To improve the service life of turbine blade, in this paper, The magnetic grinding was applied to improve the surface quality of turbine blade, including reducing the surface roughness of the blade, removing the edge burr generated in the process of femtosecond laser hole making, and reducing the residual stress on the blade surface. A neural network model was established to determine the best process parameters, and the blade was ground under the best process parameters. Using JB - 8 e contact pin type surface roughness measuring instrument, the depth of field microscope and X ‘Pert Powder respectively on blade surface residual stress test analysis system, the blade film hole roughness and orifice morphology and blade surface residual stress were analyzed. The blade surface roughness decreased from 3.08 μm to 0.19 μm, the edge burrs of the blade film holes were basically removed, and there were signs of inverted circle. After grinding, the blade lattice became more compact, and the residual tensile stress changed from 324.7 MPa to 132.8 MPa. The application of magnetic grinding can effectively reduce the surface roughness of the blade, remove the edge burr of the blade film hole. The edge of the blade film hole can be processed in an inverted circle, and the surface quality of the femtosecond laser blade film hole can be improved. At the same time, the residual tensile stress of the blade can be converted into residual compressive stress, making the lattice arrangement of the blade closer. It can improve the strength and wear resistance of blade without introducing new defects and increase the service life of blade.