The work aims to investigate the effects of temperature variation on tool adhesion, coating peeling and tool wear during intermittent machining. An experimental platform based on intermittent turning which imitated milling process was built. The cutting temperature of the flank at different cutting speed during intermittent machining was measured by thermocouple method, the wear morphology of the flank changing with cutting speed was observed by scanning electron microscopy (SEM) with energy dispersive spectroscopy (EDS) and the element composition of the tool wear area was analyzed. The relationship between the flank temperature and tool wear was described and the flank wear mechanism of TiAlN coated cemented carbide tools in intermittent machining of beryllium copper alloy C17200 was investigated. The tool temperature showed a peak at v=500 m/min with the increase of cutting speed. The higher the temperature was, the more severe the coating peeling and adhesive wear on the flank were. The coating peeling and adhesive wear were the most severe at a cutting speed of 500 m/min. Then, this phenomena slowed down as the tool temperature decreased. Coating peeling and adhesive wear at a cutting speed of 600 m/min were reduced compared to that at 500 m/min. The high temperature, impact and instability of processing environment generated by the tool continuously subjected to “loading-unloading” and “heating-cooling” during intermittent machining process are the main causes of adhesion phenomenon, coating peeling and tool wear. Coating peeling and adhesive wear are the main wear form leading to tool failure in intermittent machining of beryllium copper alloy.