In　order　to　calculate　the　critical　load　of　parabolic　concrete　filled　steel　tubular　(CFST)　arch　under　compression　and　bending,　the　equivalent　beam-column　method　was　adopted　by　introducing　a　correlation　equation　of　inner　forces.　The　buckling　factor　in　the　correlation　equation　was　the　product　of　K1　which　reflects　the　effect　of　span　to　rise　ratio　and　K2　which　considers　the　effect　of　initial　geometric　imperfection.　The　nonlinear　critical　loads　of　CFST　arch　were　calculated　by　different　methods　and　discussed.　A　comparison　with　the　test　results　and　FEM　results　indicated　that　the　critical　load　of　parabolic　CFST　arch　under　compression　and　bending　could　be　calculated　accurately　by　the　presented　equivalent　beam-column　method.