Based on the calculation of oil film static and dynamic characteristics of the conical hybrid bearing,a multiobjective optimization model considering “frictiontoload” ratio,average temperature rise and threshold rotational speed was established.According to the variation of work conditions in a workcycle of the high speed conical hybrid bearing,different weighting coefficients were applied for different objectives according to their respective importance,the optimization model was resolved by complex method.The results show that,when the half cone angle and the width of the oil sealing edge are significantly reduced,and the shallow cavity wrap angle is reduced,the optimization variables of the conical hybrid bearing are improved,the “frictiontoload” ratio and average temperature rise of the optimized oil film are effectively reduced,and the threshold rotational speed is increased.The research shows that the design objectives of lower temperature rise,higher speed or lower power consumption can be achieved by setting different weighting coefficients for the optimization objectives of “frictiontoload” ratio,average temperature rise and threshold rotational speed.