The numerical analysis method was used to establish a oneway thermal fluidstructure coupling model of the slopeplatform crankshaft thrust halfring,and the influence of different oil film thickness on the lubrication performance,temperature field and deformation of the slopeplatform crankshaft thrust halfring was analyzed.The results show that the pressure field,temperature field and wall shear stress of oil film are decreased with the increasing of oil film thickness,and increased with the increasing of rotating speed.The cavitation phenomenon also has the same regularity,but it mainly occurs in the plane area that contacts the oil groove.The leakage at the outlet of the bearing bush and the friction coefficient are increased with the increasing of oil film thickness and the rotation speed.The higher the rotation speed,the greater the frictional power consumption,while the greater the oil film thickness,the smaller the frictional power consumption.The temperature field of crankshaft thrust halfring and the lubricant film have the same variation rule.The deformation of crankshaft thrust halfring is mainly affected by temperature.The smaller the thickness of oil film and the greater the rotation speed, the greater the deformation of crankshaft thrust halfring.