The friction flash temperature is an important parameter to study the thermal failure of the clutch. The temperature of clutch friction surface is usually measured by thermocouple embedding method in engineering. In order to explore the distribution of the temperature field in the clutch under the actual conditions, to provide effective basis for the choice of sensors and the arrangement of measuring points in real measurement. Thermal analysis on the dry clutch under certain conditions by means of theory and finite element method is performed to obtain the temperaturetime curves of the inner part of the sheet steel under different depths and the temperaturetime curves under different pressures and rotational speeds at certain depth. The effects of various factors on the temperature were also analyzed.