In order to study the temperature distribution of tapered roller bearing of gearbox under different operating conditions,the thermal analysis of tapered roller bearing was carried out and its finite element model was established.Through the dynamic analysis of ADAMS,the positive contact pressure and friction force of the roller under different speed were obtained.The results were imported into ANSYS as the radial force and tangential force for the static analysis,the average contact stress of the roller was obtained.The friction heat flow was calculated and the steady temperature field of the bearing was obtained,the correctness of the model was verified by experiments.The results show that with the increase of the rotating speed,the temperature of the bearing is increased continuously.The temperature is higher when the roller contacts with the inner ring than when the roller contacts with the outer ring,and the maximum value appears at the contact position between the roller and the inner ring of the bearing.