The　lubricant　film　of　hydrostatic　circular　pad　in　the　heavy-duty　rotary　table　is　affected　by　the　roughness,　thermal　and　hydrodynamic　effect,　which　can　cut　down　the　load-carrying　capacity　and　machining　accuracy　of　the　heavy-duty　machine　tool.　In　this　paper,　a　coupled　energy　equation　with　mean　Reynolds　equation　based　on　the　Christensen＇s　stochastic　model　of　rough　surfaces　is　presented　to　analyze　the　temperature　rising,　pressure　distribution　and　load-carrying　capacity　of　the　hydrostatic　circular　pad.　The　mean　Reynolds　equation,　momentum　equation,　continuity　equation,　and　energy　equation　are　coupled　and　solved　using　the　finite　difference　method　to　obtain　the　characteristics　of　lubricant　film.　It　is　found　that　the　uneven　pressure　distribution　and　the　temperature　rising　of　lubricant　film　in　resistive　oil　edge　of　hydrostatic　circular　pad　are　related　to　the　increase　of　dimensionless　hydrodynamic　parameter　S　due　to　the　thermal　and　hydrodynamic　coupling　effect.　The　load-carrying　capacity　and　stability　of　heavy-duty　rotary　table　is　weakened　due　to　the　thermal　and　hydrodynamic　effects.