With　the　increasing　span　of　concrete-filled　steel　tube　arch　bridge,　in　order　to　ensure　the　safety　of　design　and　construction,　it　is　necessary　to　explore　the　applicability　of　the　current　specification　for　the　ultimate　bearing　capacity　evaluation.　A　500 m-level　real　bridge　is　taken　as　the　engineering　background　in　this　paper.　The　differences　between　Technical　Code　for　Concrete-　Filled　Steel　Tube　Arch　Bridges　(GB　50923–2013)　and　Specifications　for　Design　of　Highway　Concrete-Filled　Steel　Tubular　Arch　Bridges　(JTG/TD　65–06-2015)　in　the　calculation,　evaluation　and　coefficient　values　are　compared　and　analyzed.　The　results　show　that　the　value-taking　of　arch　rib　stiffness,　impact　coefficient,　closure　temperature　and　other　parameters　in　accordance　with　GB　50923–2013　is　safer　and　more　accurate.　©　The　Author(s),　under　exclusive　license　to　Springer　Nature　Switzerland　AG　2025.