This　paper　compiled　an　experimental　database　consisting　of　320　square　concrete-filled　steel　tube　(CFT)　beam-　columns　subjected　to　cyclic　loading.　Approximately　82　%　of　these　specimens　were　conventional-strength　CFTs,　revealing　a　significant　lack　of　test　data　for　high-strength　CFTs.　According　to　the　current　AISC　Specification　(AISC　360-16),　CFTs　are　classified　into　three　categories　based　on　the　width-to-thickness　ratio　(b/t):　compact,　noncompact,　and　slender　sections.　Notably,　there　is　a　gap　in　research　regarding　the　seismic　behavior　of　non-　compact　and　slender　CFTs.　To　address　this　gap,　detailed　finite　element　(FE)　models　were　developed　and　validated.　Based　on　the　benchmarked　model,　an　additional　156　high-strength　concrete-filled　high-strength　steel　(HS-　HC)　models　were　introduced　to　supplement　data　for　high-strength　square　concrete-filled　steel　tube　(HS-SCFT)　members　with　slender　and　noncompact　sections.　Combined　with　the　experimental　database　and　the　FE　analysis,　the　calculation　method　for　the　strength　of　HS-SCFT　beam-columns　as　outlined　in　AISC　360-16　and　GB50936　was　evaluated.　The　results　indicated　that　the　axial　load　(N)　calculated　according　to　GB50936　was　more　conservative　for　compact　sections,　whereas　the　N　calculated　using　AISC　360-16　was　more　conservative　for　slender　sections.　Additionally,　the　flexural　strength　(M)　calculated　using　AISC　360-16　demonstrated　the　best　agreement　with　experimental　results,　while　the　M　calculations　from　GB50936　exhibited　greater　dispersion.　A　new　simplified　method　for　calculating　the　load-displacement　skeleton　curve　of　HS-SCFT　beam-columns　was　proposed　considering　the　effect　of　critical　parameters.　The　findings　indicated　that　the　proposed　method　effectively　captures　the　behavior　of　HS-SCFT　beam-columns　under　cyclic　loading.