Abstract: In the high-end manufacturing industry, titanium carbonitride (TiCN)-based ceramic cutting tools have attracted wide attention for their excellent chip surface quality and excellent properties such as red hardness, wear resistance and oxidation resistance. The high temperature friction and wear properties of TiCN-based cermet at different temperatures (600 °C, 700 °C, and 800 °C) were studied based on the actual processing of TiCN foundation ceramics. The relationship between phase change, microstructure and wear marks, composition change, friction coefficient at different temperatures were analyzed respectively by means of X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive spectroscopy (EDS), high temperature friction and wear tester, and profilometer. The effects of composition and microstructure on high temperature friction and wear properties of cermets were discussed as well. The results show that the main wear mechanism is abrasive wear and grain slipping at room temperature, while at high temperature it is adhesive wear and oxidation wear. The formation and shedding of friction layer has a significant effect on the friction performance in the process of friction and wear.