In order to improve the bearing capacity and rotation accuracy of hydrostatic bearing,a kind of hydrostatic bearing lubricated with magnetorheological fluid was proposed.The structure of the MRF hydrostatic bearing was designed,and its bearing capacity and oil film stiffness were analyzed and calculated.The effects of different bearing materials and different current on the performance of hydrostatic bearing were analyzed by Maxwell simulation,and the influence of different clearance on the bearing capacity of hydrostatic bearing was analyzed by CFX fluid simulation.Through simulation analysis,cast iron with the largest magnetic induction strength was selected as the bearing material to adapt to greater load changes,and the radius gap of 20 μm was selected to increase the bearing capacity.Through the fluid structure coupling simulation of ANSYS,the advantages of the designed magnetorheological hydrostatic bearing were verified.Compared with the ordinary hydrostatic bearing,its bearing capacity is increased by 11.6% and the rotation accuracy is improved by 17.4%.