This　study　addresses　the　current　research　gap　in　the　mechanical　performance　of　Concrete　Filled　Steel　Tubular　(CFST)　lattice　columns,　focusing　on　high-strength　or　ultra-high-strength　materials.　Tests　were　conducted　on　six　Ultra-High-Strength　Concrete　(UHSC)　filled　steel　tubular　lattice　short　columns　to　investigate　their　axial　compression　performance.　Experimental　parameters　included　core　concrete　strength　and　steel　tube　wall　thickness　of　the　CFST　limbs.　Discussions　covered　failure　modes,　load-displacement　curves　of　specimens,　load-strain　relationships　of　limb　tubes　and　lacing　tubes,　and　Poisson＇s　ratios　of　limb　tubes.　Subsequently,　Finite　Element　Model　(FEM)　was　established　using　ABAQUS　Software　and　verified　by　test　results.　The　FEM　was　employed　for　further　parameter　analysis,　including　the　steel　tube　wall　thickness　of　the　limb,　the　core　concrete　strength　of　the　limb,　the　steel　tube　strength　of　the　limb,　and　the　center　distance　between　the　limbs.　Finally,　existing　calculation　methods　for　predicting　the　ultimate　bearing　capacity　of　UHSC-filled　steel　tubular　lattice　short　columns　were　evaluated,　leading　to　the　proposal　of　a　practical　and　accurate　calculation　method　based　on　the　findings.