To　better　understand　the　dynamic　characteristics　of　a　hydrostatic　spindle　in　fluid-structure　coupling,　the　impact　of　oil　film　slip　on　the　4　dynamic　stiffness　and　damping　coefficients　of　the　spindle　is　studied.　On　the　basis　of　modified　Reynolds　equation,　which　considers　the　microscale　velocity　slip　effect,　rotation　error　of　the　spindle　is　calculated.　To　solve　the　rotor　axis　orbit　under　the　existence　of　eccentric　quality,　4　dynamic　stiffness　and　damping　coefficients　of　the　oil　film,　which　describe　the　dynamics　of　a　rotor　axis　orbit,　are　calculated　by　using　load　increment　method　and　the　pressure　perturbation　method.　The　research　results　show　that　velocity　slip　caused　a　certain　impact　on　dynamics　of　bearing　stiffness　and　damping　performance.　The　experiment　of　the　measuring　path　of　the　shaft　verifies　the　correct　and　effect　of　the　orbit　of　shaft　center　model.