The　shear　performance　of　three　concrete-filled　steel　tubular　(CFST)　composite　columns　was　investigated　via　single-point　shear　tests,　considering　shear-span　ratios　of　0.75,　1,　and　1.5.　The　findings　indicated　that　the　failure　mode　of　the　CFST　composite　column　transitioned　from　oblique　compression　shear　failure　to　localized　shear　failure　in　the　joint　areas　as　shear-span　ratio　decreased.　An　extended　analysis　of　the　parameters　was　carried　out　utilizing　the　ABAQUS　finite　element　model.　The　analysis　indicates　that　the　ultimate　shear　resistance　capability　of　steel-concrete　composite　columns　increases　with　the　rise　in　the　strength　of　the　batten　concrete,　the　batten　concrete　thickness-to-span　ratio,　and　the　outer　diameter　of　column　limbs.　However,　it　decreases　with　an　increase　in　shear-span　ratio.　The　accuracy　of　the　calculation　methods　for　existing　similar　structures　was　assessed,　and　based　on　the　force　transmission　mechanism　of　CFST　composite　columns,　theoretical　and　simplified　calculation　methods　were　proposed　that　meet　engineering　precision　requirements.　Consequently,　this　method　offers　a　valuable　theoretical　reference　for　engineering　applications.　©　2024　by　The　Hong　Kong　Institute　of　Steel　Construction.