Finite　element　method　(FEM)　has　become　one　of　the　important　structural　analysis　methods　for　its　wide　applicability　and　its　exact　and　nice　simulation.　It　can　be　used　to　further　the　research　of　concrete-filled　steel　tubes　(CFST),　however　the　calculation　difficulties　need　solving　method　with　better　applicability.　The　FEM　application　in　CFST　research　was　addressed　summarily.　Some　issues,　such　as　core　concrete　model　and　interface　model　were　discussed.　The　FEM　model　in　this　paper　is　reliable　by　verifying　a　mass　of　examples.