Hydrostatic guide-way is used on CNC machine tools because of its advantages. In order to meet the requirements of ultra-precision CNC machine tool for precision and high speed, a new type hydrostatic guide-way with high liquid resistance is put forward. The simulation has been done how the position, width and depth of the ring on oil seal edge of hydrostatic guide-way effect on the oil chamber pressure. It is verified that the chamber's pressure of hydrostatic guide-way can be enhanced significantly if the position, width and depth of the ring are appropriate. It is reasoned that the carrying capacity and stiffness of hydrostatic guide-way are improved when a ring is set on its oil seal edge. The conclusion can be got that the new type hydrostatic guideway has a better carrying capacity and stiffness because of the ring if its position, width and depth are appropriate.