By using united simulation method of multipads,steadystate and transientstate lubrication analysis was carried out on one marine Mitchell thrust bearing under shaft misalignment conditions.The parameters distribution of steadystate lubrication and the parameters’changing rule according to the shaft misalignment as well as the transient response of the lubrication parameters under a step load condition were acquired separately for each pad.The results show that the titling angle of the pads changes within the orders of magnitude of the shaft misalignment,and the supporting structure should guarantee that pads could still tilt freely to ensure the formation of oil film.Under the shaft misalignment condition,the load and the oil film temperature of the pads that closed to the thrust collar are increased,while the oil film thickness is decreased.The load and the oil film temperature of the pads that stayed far from the thrust collar are decreased,while the oil film thickness is increased.The difference of lubricating parameters of pads is increased along with increasing of tilting angle of shaft misalignment.When a step load is applied,the lubricating parameters of each pad changes in a very short time.The small amount of shaft misalignment causes safe operation of the thrust bearing deteriorated seriously,and it is of significance to improve the misalignment compensation ability of the thrust bearings.