Based on Jones’ method of quasistatics for ball bearings, an optimized quasistatics analysis model was established by coupling the influence factors of lubricating oil between ball rolling body and raceway, the interaction between cage and ball rolling body, and the dynamic pressure lubrication between cage and guide ring.Compared with Jones’ classical quasistatics model simulation results, the established quasistatics model is accurate and feasible. On this basis, the optimized quasistatics model was used to analyze the dynamic characteristic parameters of bearings, such as the oil film condition between ball and raceway and the force of the cage, under different working conditions.The results show that the effect of the bearing rotating speed on the oil film thickness between the ball and inner and outer rings is greater than that of load; with the increasing of the bearing rotating speed,the normal load between the cage and the ball is decreasing, and the force exerted by distribution pressure of fluid dynamic pressure on cage is increasing, and both trend to stable gradually