Abstract: Aiming at the problems existing in the thrust bearing of the prokaryotic main pump, the structure optimization is carried out, and the thrust bearing test bench is built to test the performance of the original bearing and the optimized bearing respectively: under the rated load condition, the temperature of the bearing thrust pad before and after optimization is proportional to the speed; moreover, under the same working conditions, the temperature of the optimized bearing thrust pad is significantly lower than that before optimization, indicating that the optimized bearing has stronger heat dissipation capacity. After optimization, the power consumption of the thrust bearing is reduced by 3.5 kW, the heat transfer capacity is increased by 29.4%, the temperature of the thrust pad is reduced by 3.2%, the temperature of the guide pad is reduced by 8.9%, and the bearing capacity is significantly improved.