To　improve　the　dynamic　performance　of　a　hydrostatic　worktable,　this　paper　gives　a　formula　of　hydrodynamic　loads　at　a　hydrostatic　recesses　firstly.　Next　the　static　bearing　capacity　load　of　an　oil　film　from　an　oil　pump　at　the　same　recesses　is　calculated.　Then　both　dynamic　and　static　bearing　capacity　loads　are　integrated　as　a　formula.　Based　on　the　formula,　the　oil　film　stiffness　is　inferred.　On　the　next　stage,　an　optimization　design　model　of　a　benchmark　hydrostatic　worktable　system　is　established,　in　which　the　optimal　target　is　to　maximize　integrated　bearing　capacity　loads　and　oil　film　stiffness　mentioned　above,　and　the　constraint　is　the　frequency　at　the　first　order.　Next　response　surface　methodology　and　multi-layer　method　of　a　feasible　direction　are　applied　to　solve　the　optimal　model.　Finally,　the　analysis　for　time　history　response　under　a　transient　impact　load　is　completed　to　check　over　the　working　accuracy　of　a　finished　optimal　structure.　Overall　the　optimal　results　and　methodology　provide　a　theoretical　basis　in　new　generation　design　of　practical　structures.