The cutting temperature of machinable ceramics is studied by cutting fluorophlogopite with carbide tools. The representative temperature-characteristic temperature was used to represent cutting temperature to study the cutting temperature of machinable fluorophlogopite ceramics. The results indicate that temperature gets a narrow change range caused by the increasement of rotate speed. With the increasement of feed, the characteristic temperature goes down overall, while the speed goes down rapidly ranging from 0.1~0.12 mm/r, and the temperature goes down with quite large amplitude. In the process of temperature increasing caused by the increasement of cutting depth, there is a declining stage after which temperature change range becomes bigger. With the increasement of cutting times, the characteristic temperature rises up at the same processing parameter, because the friction heat is the dominant factor of the changes of cutting temperature and with the increasement of cutting times, tool wear increases and temperature goes up. Because of low thermal conductivity and high brittleness of ceramics, the vibration degree of cutting temperature is not obvious.