Based on fluid-structure two-way coupling theory,the effects to the bearing lubricating properties caused by tile-surface position parameters and materials were studied by using CFD technology to make numerical simulations of a storage unit thrust bearing.The results show that film pressure and load are increased with the increasing of tile-surface inclination,and the position of central pressure deflects along the outward rotation direction of the mirror plate and the radial direction of tile-surface.The pressure and load are both increased with the decreasing of oil clearance.The pressure gradient of the bearing pad is reduced with the decreasing of elastic modulus of the pad,and the position of maximum pressure is shifted to the side edge of the pad,indicating the concentration of the high-pressure region can be effectively reduced and the bearing life can be improved by appropriately reducing the elastic modulus of the pad.