Aiming at the problem that the three-point contact ball bearing of aeroengine spindle is easy to be burned when it runs at high speed,the heat generation model of bearing was established by local method.Based on the theory of fluid two-phase flow and coupled heat transfer principle,a bearing fluid-structure coupling model was established.The influence of rotating speed and oil supply on flow field and bearing temperature was analyzed.The bearing temperature rise test was carried out by using the aeroengine ball bearing testing machine,and the simulation results were verified.The results show that with the increase of oil supply,the oil quantity of the bearing outer ring increases significantly and the bearing temperature decreases.When the oil supply reaches 1.2 L/min and the oil supply continues to increase,the cooling effect is weakened.With the increase of the rotating speed,the oil in the bearing chamber decreases,and the temperature of the inner ring increases and the inner ring increases more than the outer ring.With the increase of axial load,the temperature of the inner and outer rings of the bearing increases.The maximum error between the test results and the simulation calculation is 10.27%,which verifies the rationality of the model.