A　finite　element　method　incorporating　the　material　and　geometric　non-linearity　is　presented　to　analyze　the　behavior　of　Concrete-Filled　Steel　Tubular　(CFST)　arch　with　truss　rib.　In　this　approach,　beam　element,　CFST　composite　constitutive　relation　and　the　mixed　procedure　solution　method　are　used.　Using　this　technique,　one　real　CFST　truss　arch　bridge　is　analyzed　and　some　valuable　results　are　obtained.