The　rectangular　pad　is　widely　used　in　the　hydrostatic　guide　rail,　but　hydrostatic　guide　rail　in　conditions　for　the　emergence　of　the　partial　load　or　deformation　factors,　makes　the　hydrostatic　guide　rail　in　tilted　state　of　bearing　capacity　of　oil　pad　has　a　certain　influence.　This　micro　element　method　to　establish　hydrostatic　guide　rail　are　based　on　the　actual　working　conditions　of　Reynolds　equation,　and　then　based　on　the　finite　difference　method　to　solve　the　single　rectangular　pad　under　uneven　oil　film　thickness　of　oil　film　pressure　distribution,　oil　pad　oil　cavity　pressure,　as　well　as　the　carrying　capacity　of　changing　with　the　guide　rail　inclination.　Through　analysis　shows　that　oil　cavity　pressure　and　oil　pad　bearing　capacity　with　larger　guide　angle,　both　of　them　show　a　trend　of　slow　decline.