The effect of tool flank wear on cutting force, cutting temperature, roughness and residual stress during turning process of austenitic stainless steel is studied. The test results show that when the tool flank wear in a certain range: Fx and Fz increase with the amount of wear increases significantly, while the Fy remained unchanged; with the temperature of the tool flank wear increased significantly increased; the workpiece surface roughness with tool flank wear increases. When turning the flank wear is 0167 mm, residual stress is at maximum on the workpiece surface.