Due　to　irregular　cross-sectional　shape　and　complex　compressive　behavior　of　special-shaped　CFST　column　coupled　with　multiple　cavities,　the　bearing　capacity　can＇t　be　calculated　by　the　method　suiting　to　regular　shaped　CFST　columns.　In　this　paper,　on　the　basis　of　the　tested　bearing　capacity　results　of　six　special-shaped　CFST　columns　coupled　with　multiple　cavities　including　two　kinds　of　cross-sectional　shapes　under　axial　compression,　calculation　method　analysis　and　evaluation　in　available　specifications　and　codes　were　conducted.　Moreover,　the　bearing　capacity　calculation　method　specifically　for　special-shaped　CFST　columns　coupled　with　multiple　cavities　was　studied.　Research　shows　that　most　bearing　capacity　calculated　by　non-circular　CFST　column　formulas　in　available　specifications　or　codes　are　lower　than　the　test　values,　and　are　safe　in　design.　Based　on　Mander＇s　confined　concrete　model,　the　confinement　effect　is　took　into　accounted　by　dividing　concrete　into　effective　and　ineffective　confined　regions　in　the　proposed　method.　The　calculated　bearing　capacity　are　a　little　more　than　the　test　values,　but　the　relative　errors　are　within　5%.　©　2016,　Editorial　Office　of　Journal　of　Building　Structures.　All　right　reserved.