Precision　measurement　technology　and　instruments　are　the　basis　for　high-quality　development　in　modern　industry.　With　the　specialization　of　supporting　facilities,　ultra-precision　motion　guidance　has　become　a　core　technology　to　achieve　ultra-precision　measurement.　Aerostatic　bearings　have　the　advantages　of　low　friction　and　high　precision,　and　are　gradually　playing　an　irreplaceable　role　in　precision　measurement　and　instruments.　This　paper　summarizes　and　puts　forward　two　contradictions　for　improving　the　loading　capacity　of　aerostatic　bearings,　and　investigates　how　to　solve　them　via　structural　design.　This　paper　analyzes　the　characteristics　of　the　engineering　calculation　method,　the　gauge　pressure　ratio　method,　the　gas　resistance　calculation　method,　and　the　AFVM　(adaptive　finite　volume　method)　proposed.　Finally,　this　paper　summarizes　the　application　scope　of　each　method,　gives　solutions　to　the　core　problems,　and　outlines　the　developing　trends.