In this paper, the performance of three microtextured tools in machining Inconel 718 high-temperature alloy under two different coating conditions was investigated using the finite element method. Firstly, the theoretical tool-chip contact length model of the microtextured tool is established. Secondly, the theoretical model of cutting force and cutting the heat of the surface weave tool is established using the theoretical tool-chip contact length model. The theoretical analysis of cutting force and cutting temperature of the microtextured tool is carried out according to the variation law of the theoretical tool-chip contact length. And finally, the finite element simulation model is established. The effect of changing the coating material on the machining performance of microtextured tools is discussed by changing the coating material on the tool surface. By establishing the simulation model, the changing patterns of cutting force, cutting temperature and effective stress of the three microtextured tools are compared under different coating materials. Adding coating materials to the tool surface can effectively improve machining efficiency. In addition, it is proposed that different microtexture shapes produce different degrees of secondary cutting during the turning of microtextured tools.