Abstract: A 3-dimensional compound structural calculation model constructed by beams and rope elements is used to analyze the structural behavior of a certain long-span suspended arch bridge. In the analysis, the structural nonlinearity and ultimate bearing capacityofmembers are considered, and the deformations during construction and the superposition effectof stresses are also taken into account. The emphasis of the study is focused on the nonlinear deformations, internal forces and stability of the bridge during construction and operation. Meanwhile, The distributions of dead and live loads between the cable and arch of the bridge are discussed.