According to the quasidynamic model of high speed ball bearings, the moment friction and relative sliding speed of each bearing components at the contact point were analyzed. A bearing heat generation calculation model were established by using the local analysis method. The effects of speed, load and bearing geometry parameters on local and total heat generation among bearing components were studied. The designed bearing test rig was built to monitor the variation of bearing heat generation under different working conditions; the theoretical calculation results were compared with the experimental results under the same conditions to verify the correctness of the theoretical model.The results show that the rotational speed and the applied thrust load are the main factors that cause the total bearing heat generation at stable stage; there is a minimum heat generation of bearing with optimal values of the inner and outside groove curvature radius factors with a fixed ball diameter; the analysis of the change law of bearing heat generation is beneficial to the calculation of bearing temperature field and the selection of lubricating oil quantity. The research results provide reference for the optimization design of bearing structure.