In　this　paper,　an　analytical　investigation　of　concrete-filled　steel　tubular　(CFST)　columns　is　presented.　Though　CFST　columns　have　different　section　types　(for　example,　single-tube　form,　dumbbell　form　and　lattice　form),　thev　have　some　common　characteristics　on　the　static　behavior.　Following　this　idea,　a　uniform　methodology　for　calculating　the　ultimate　load-carrying　capacity　of　CFST　columns　is　proposed　on　the　basis　of　analysis　of　calculation　methods　of　domestic　and　international　design　criteria.　Test　verifications　of　the　new　calculation　method　on　CFST　single　tube　columns,　dumbbell　shaped　columns　and　laced　columns　are　presented　respectively,　and　the　results　indicated　that　the　calculated　values　of　ultimate　loads　using　this　new　method　agree　well　with　the　test　values.