The rim propulsion motor is lubricated with seawater.It is difficult to establish an effective dynamic pressure lubrication effect due to the low viscosity of seawater.The thrust also increases significantly as the propulsion power of the rim thruster increases.These problems and requirements propose new challenges to the lubrication performance of the rim thruster thrust bearing.A thrust bearing design scheme to meet the propulsion requirements of rim propulsion motor was presented.A hydrodynamic model of water-lubricated thrust bearing was established combined with the hydrodynamic lubrication theory.Based on the finite element method,the variation laws of the pressure distribution,maximum temperature distribution,Reynolds number and friction power consumption were calculated.The results show that the pressure of the thrust bearing of the rim propulsion motor is concentrated in the middle part of the bearing bush.It varies with the inclination angle and film thickness of the bearing bush.The temperature distribution basically keeps unchanged with speed.A significant decrease in Reynolds number at high speeds.The friction power consumption continues to increase with speed.