This　paper　investigated　the　flexural　behavior　of　high-strength　concrete-filled　steel　tube　(HSCFST)　members　subjected　to　cyclic　loadings.　Nine　cyclic　tests　of　square　HSCFST　members　were　conducted.　The　investigated　parameters　were　the　height　of　steel　tube,　thickness　of　steel　tube　wall,　yield　stress　of　steel,　and　compressive　cylinder　strength　of　concrete.　A　finite　element　(FE)　model　was　developed　and　validated.　Results　from　the　experimental　tests　and　FE　analyses　indicated　that:　(i)　the　failure　modes　of　HSCFST　members　were　characterized　by　local　buckling　and　fracture　of　the　steel　tube,　both　occurred　earlier　with　increasing　height　or　yield　stress　of　steel,　or　with　decreasing　thickness　of　steel　tube　wall,　but　were　delayed　when　higher　strength　concrete　was　used;　(ii)　using　high-strength　steel　significantly　improved　the　flexural　strength,　had　no　obvious　influence　on　the　flexural　stiffness,　but　significantly　reduced　the　ductility;　(iii)　using　high-strength　concrete　improved　the　flexural　strength,　stiffness,　and　ductility;　and　(iv)　the　limits　by　AISC　341-16　on　the　slenderness　coefficient　is　conservative　for　HSCFST　members　subjected　to　cyclic　flexural　loadings.　©　2023　Institution　of　Structural　Engineers