The finite element model of turbine classifier bearing for steam jet mill under the condition of superheated steam was established based on ANSYS.The effects of friction heating of the bearings,superheated steam and oil cooling on the temperature rising of classifier bearings were discussed under different classifier rotating speed.The results show that the higher the classifier rotating speed is,the higher the selfheating temperature of classifier bearing is,and the larger the temperature difference between upper bearing and lower bearing becomes.The heat transfer of superheated steam has great influence on temperature rising of classifier bearings,which results in the increase of the temperature difference between the bearings.The method of oil cooling can make the temperature of classifier bearing less than the maximum service temperature of 75 ℃,and the temperature of classifier spindle higher than 100 ℃ to avoid the steam condensation.Compared the measured data with the simulation results of temperature rising,it shows the temperature of the spindle bearing under the condition of superheated steam could be predicted using the numerical simulation method based on ANSYS.