Accuracy　of　machine　tool　with　a　gantry　frame　is　reduced　due　to　the　vibration　caused　by　inertial　force　impact.　Hydrostatic　slider　bearings　are　considered　as　key　structures　of　machine　tools,　which　play　an　important　role　in　improving　impact　and　vibration　resistance　ability　as　dynamic　performance.　In　this　work,　an　incline　model　which　combines　bending　deformation　with　linear　displacement　is　simulated　using　working　conditions　of　the　straddle　carrier　under　inertial　force　impact　as　an　imitation　of　vibration　amplitude.　Using　finite　difference　method　(FDM),　numerical　solution　of　pressure　distribution　in　oil　pad　can　be　determined　by　solving　the　Reynolds　equation.　Relationship　between　carrying　capability　and　incline　extent　can　be　determined　by　analyzing　the　resolution　of　the　Reynolds　equation.　A　new　type　of　oil　pad　size　optimizing　process　is　propose　in　this　work,　which　is　carried　out　based　on　the　analysis　of　the　analyzing　result　to　enhance　the　inertial　force　resistance　ability.　Finally,　impact　resistance　capacity　of　machine　tool　can　be　improved　by　sacrificing　oil　film　thickness.