The　Navier　velocity-slip　boundary　conditions　are　adopted　to　fluid　continuous　flow　equation.　Modified　Reynolds　equation　in　micro-scale　is　obtained.　Based　on　the　conservation　of　oil　film　flow　and　the　assumption　of　linearization　distribution　of　oil　film　pressure,　the　load　capacity　is　gained　in　the　consideration　of　slip.　Through　comparison　and　analysis,　the　performance　of　hydrostatic　bearing　under　the　micro-scale　is　different　from　tradition.　With　the　increase　of　slip　length,　load　capacity　is　reduced.　The　oil　film　thickness　of　the　maximum　load　capacity　decreases.　Slip　phenomenon　is　more　serious,　the　effect　is　more　obvious.　So　the　design　of　bearing　must　consider　the　influence　of　the　micro-scale.