Experiments　of　steel　tubular　arch　and　CFST　arch　under　five　in-plane　symmetrical　concentrated　loads　were　carried　out.　The　behaviors　of　tube　arch　under　multi-symmetrical　loads　are　discussed　and　the　simplified　method　to　calculate　the　ultimate　load-carrying　capacity　is　analyzed.　The　analytical　results　show　that　under　symmetrical　in-plane　multi　concentrated　loadings,　the　arch　with　bending　moment　may　fail　with　bifurcate　buckling.　In　the　case　that　the　axial　force　is　dominant,　the　effects　of　filled　concrete　to　strength　and　stiffness　in　the　tubular　arch　are　significant.　The　equivalent　beam-column　method　used　to　calculate　the　ultimate　load-carrying　capacity　of　arch　is　stable.