Water lubrication slope-platform thrust bearing uses water as its lubricant medium,so the traditional calculation formula and charts of slope-platform thrust with oil lubrication are no longer applicable.Based on the theory of computational fluid dynamics(CFD),water film lubrication models were built,and the simulation calculation was performed to analyze the effects on load capacity of one slope-platform thrust bearing by the minimum thickness of water film,ratio of pad height to the minimum film thickness,ratio of length of the inclined surface to the total length and angular speed.Results show that water film thickness is the main factor affecting the loading capacity，and loading capacity is increased with the decrease of the water film thickness.There is an optimum ratio of length of the inclined surface to the total length and ratio of pad height to the minimum film thickness,which maximizes the load capacity when groove size,the minimum film thickness of water film and angular speed are constant.The best ratios are approximately 0.7 and 2 respectively.In addition,the cavitation occurs on the bearing wall near the sink,and the speed of the thrust ring will not affect the center location of water film pressure.