To　improve　the　performance　of　heavy　load　and　oil-film　stiffness　of　an　NC　machine＇s　hydrostatic　turntable,　a　new　structural　hydrostatic　oil　pad　with　multi-ring　flow　channel　oil　recess　and　damping　oil　seal　edge　is　put　forward　and　proved.　Combining　with　the　optimization　design　of　the　hydrostatic　oil　pads　and　CFD　technology,　the　flow　model　of　two-dimensional　axial-symmetry　is　used　for　numerical　simulation.　The　inner　flow,　carrying　capability,　and　stiffness　of　the　new　structure　hydrostatic　oil　pad　are　analyzed　and　calculated.　Moreover,　these　data　are　compared　with　those　of　the　traditional　oil　pad　that　has　a　single-chamber　and　single-plane.　Result　shows　that　the　hydrostatic　oil　pad　of　the　new　structure　can　make　turbulence　appear　in　the　damp　flow-passes　and　the　damp　grooves,　enhance　damping,　make　it　available　of　higher　pressure　gain　and　get　partial　hydrostatic　effectiveness　in　grooves.　Therefore,　it　comes　true　to　bear　heavier　load　and　generate　stronger　oil-film　stiffness　compared　with　the　traditional　oil　pad.　It　is　available　for　the　optimization　design　and　performance　calculation　of　the　complex　structure　hydrostatic　oil-pad　by　CFD,　which　increases　the　efficiency　of　design　and　accuracy　of　calculation.　The　study　of　the　new　hydrostatic　oil　pad　is　important　to　improve　the　performance　of　the　heavy　load　hydrostatic　turntable.