To　study　the　effect　of　stirrup　confinement　on　the　axial　compressive　bearing　capacity　of　ultra-high-strength　con⁃　crete　(UHSC)　precast　columns,　this　paper　first　conducted　an　axial　compression　contrast　experiment　between　full-size　UHSC　column　and　ordinary　column,　and　investigated　the　difference　of　crack　development,　failure　pattern　and　ultimate　bearing　ca⁃　pacity　of　these　two　type　columns.　Based　on　the　experimental　results,　further　finite　element　analysis　was　conducted　to　simu⁃　late　36　full-scale　UHSC　columns.　The　study　focused　on　analyzing　the　effects　of　stirrup　configuration,　stirrup　spacing,　and　stirrup　diameter　on　the　axial　compressive　performance　of　UHSC　columns.　Combining　the　experimental　findings　and　para⁃　metric　analysis　results,　a　modified　calculation　formula　for　the　axial　compressive　bearing　capacity　of　UHSC　columns　con⁃　sidering　stirrup　confinement　was　proposed.　The　proposed　formula　was　then　compared　with　the　calculation　formula　in　the　current　Code　for　Design　of　Concrete　Structures.　The　results　show　that:　the　ultimate　bearing　capacity　of　equal-strength　de⁃　signed　UHSC　column　is　higher　than　that　of　ordinary　concrete　column,　but　it　is　more　brittle　than　ordinary　concrete,　espe⁃　cially　when　reaching　the　ultimate　bearing　capacity;　the　confinement　effect　of　stirrups　on　the　core　concrete　enhances　the　axial　compressive　bearing　capacity　of　UHSC　columns.　Changes　in　stirrup　configuration,　stirrup　spacing,　and　stirrup　diameter　have　a　significant　impact　on　the　ultimate　bearing　capacity　and　peak　compressive　strain　of　UHSC　columns;　the　proposed　axial　compressive　bearing　capacity　correction　formula　for　UHSC　columns　incorporates　the　differences　between　UHSC　columns　and　ordinary　concrete　columns,　considering　the　confinement　effect　of　stirrups　on　the　core　concrete.　Compared　to　the　calcu⁃　lation　formula　provided　in　the　code,　which　does　not　account　for　stirrup　confinement　and　is　primarily　applicable　to　ordinary　concrete　columns,　this　formula　better　utilizes　the　material’s　potential　while　ensuring　safety　margins.　It　can　serve　as　a　useful　reference　for　practical　engineering　design.　©　2025　South　China　University　of　Technology.　All　rights　reserved.