The　large-span　beam-arch　composite　system　bridge　is　subjected　to　huge　axial　force　and　bending　moment,　and　the　structure　is　complicated　and　prone　to　cracking,　which　affects　the　operational　safety　of　the　bridge.　To　investigate　the　local　stress　state　of　the　arch-beam　joint　of　the　basket-type　arch-beam　combined　system　bridge,　this　paper　conducted　a　refined　finite　element　simulation　analysis　on　the　basket-type　steel　box　arch　with　the　Wulong　River　Bridge　of　Fuzhou-Changle　Airport　Intercity　Railway　as　the　engineering　background,　and　deeply　investigated　the　stress　distribution　and　structural　safety　of　the　arch-beam　joint.　The　results　showed　that　the　local　model　was　consistent　with　the　stress　distribution　of　the　whole　bridge　rod　system　model　under　the　same　loading,　which　ensured　the　reliability　of　the　analytical　results.　Under　the　most　unfavorable　loading　condition,　the　shear　force　was　small　and　did　not　play　a　key　role,　the　axial　force　was　pressure　and　did　not　vary　much,　the　arch　was　compressed　and　the　arch　back　was　tensile.　The　overall　stress　of　the　local　model　was　uniform,　and　the　overall　stress　level　of　the　structure　was　lower　than　the　design　strength　of　the　material,　so　the　structure　was　reasonably　stressed　and　met　the　design　requirements.　©　The　Author(s),　under　exclusive　license　to　Springer　Nature　Switzerland　AG　2025.