Abstract: High-temperature alloy is widely used in various industrial fields due to its excellent performance. However, as a typical difficult-to-machining material, studying on its cutting performance, in particular of applying new cutting tool in high-temperature alloy cutting, appears vitally important. The new coating AlCrN carbide is suggested in this work. In order to analyze the wear mechanism and compare the performance of different materials, tools of coating AlCrN, no-coating YW1 and TiAlN coated carbide were used to execute a series of cutting tests on nickel base high-temperature alloy GH4169 with the use of optical microscopy, scanning electron microscopy, spectroscopy probes and other measures. The time-velocity (T-v) formula on the service life of the cutting tools was established. Taking tool endurance as the evaluation index, the wear form, wear mechanism and the cutting performance of the new AlCrN coated carbide tool applying in alloy GH4169 were analyzed. The results show that, for dry machining nickel-based high-temperature alloy, the performance of AlCrN coated carbide tool is obviously better than the current tool with TiAlN coating. The failure mode shows that there are some micro-chipping on the main cutting edge and the flank wear, while the wear of rake face is relatively low. As for the wear mechanisms, it could be considered as the result of a combined effect of diffusion, oxidation and adhesive wear under high temperature and high stress.