Due to the combination of guide ring and seal ring,the traditional hydraulic cylinder has many problems,such as high internal friction,slow response speed,poor anti eccentric load force and so on.Based on the theory of hydrostatic bearing,a new type of elliptical hydrostatic bearing hydraulic cylinder and its design method were proposed.By means of theoretical calculation and simulation,the anti-eccentric load force and friction force of traditional,rectangular and elliptical hydrostatic chambers hydraulic cylinders were compared and analyzed,respectively.The simulation results show that the anti-eccentric load capacity and friction performance of the hydrostatic bearing hydraulic cylinder are significantly better than those of traditional structural hydraulic cylinders;and the elliptical hydrostatic chamber structure has obvious advantages.The experimental test platform was designed,the above calculation model and simulation were verified through experiments.