In order to improve the milling surface quality of GH4169， dry cutting experiments were conducted by designing biomimetic shark skin micro-textured tools to study the effects of milling parameters on cutting force， cutting deformation coefficient， and surface roughness. The results show that， compared to non-textured tools and linear micro-textured tools， the biomimetic shark skin micro-textured tools provide the highest reduction in milling force， reaching up to 31%. Furthermore， the cutting force first decreases and then increases with rising cutting speed. At the same time， the cutting deformation coefficient of the biomimetic shark skin micro-textured tools is the largest， indicating good chip breaking capability. For the biomimetic shark skin micro-textured tools， the surface roughness of the machined workpiece decreases with the lower cutting speed and smaller feed per tooth. The influence of milling depth on the surface roughness of the machined workpiece exhibit a trend of initial decrease followed by increase. By analyzing the effects of different textured tool types and milling parameters on the surface roughness of the machined GH4169 superalloy， it is found that the optimal milling surface quality of the workpiece is obtained at a cutting speed of 200 m/min， a feed per tooth of 0.1 mm/z， and a milling depth of 1.8 mm.