Based　on　nonlinear　full-range　analysis,　considering　both　geometrical　and　material　nonlinearity,　ultimate　load-carrying　capacity　of　cooperated　system　is　calculated.　The　study　on　effects　of　the　concrete　shrinkage　and　creep,　the　ratio　of　reinforcement　of　stiffening　girder,　the　safty　coefficients　of　cable　and　restraint　of　bearing　on　ultimate　load-carrying　capacity　of　the　structure　indicates　that　the　elastic　ultimate　load-carrying　capacity　is　much　greater　than　the　elastic-plastic　one,　and　the　attention　should　be　paid　to　selection　of　the　safety　coefficient　of　the　cable.　Furthermore　it　is　found　that　for　the　condition　of　loading　on　the　entire　bridge　and　half　bridge,　the　safety　coefficients　of　ultimate　bearing　capacity　of　Jinma　bridges　are　respectively　21.40　and　9.67,　which　means　that　the　ultimate　bearing　capacity　of　cooperated　system　is　very　fine.　Some　conclusions　are　given　which　will　be　helpful　to　the　preliminary　design　and　construction　of　the　similar　bridge.