For　the　reinforced　concrete　bridges,　the　degeneration　phenomenon　such　as　corrosion,　bond　degradation　and　fatigue　damage　will　occur　under　the　double　action　of　environmental　effect　and　loading.　The　comprehensive　action　of　the　three　factors　cannot　be　entirely　considered　according　to　the　current　bearing　capacity　calculation　methods.　The　influence　of　corrosion,　bond　degradation　and　fatigue　damage　on　the　bearing　capacity　of　RC　bridge　was　intensively　elaborated　based　on　the　existing　achievements,　and　the　reduction　of　reinforcement　area　under　the　coupling　action　of　corrosion　and　fatigue　was　analyzed.　The　analytic　expression　of　cross　section　cooperative　work　coefficient　was　deduced　according　to　the　deformation　coordination　relationship　between　corroded　steel　bar　and　concrete　interface,　and　the　bearing　capacity　calculation　method　considering　corrosion,　bond　degradation　and　fatigue　damage　was　proposed.　Taking　one　reinforced　concrete　simply　supported　beam　as　an　example,　the　degradation　process　of　bearing　capacity　was　analyzed　by　the　finite　element　method　and　the　theoretical　method　proposed　in　this　study,　respectively.　The　results　show　that　the　evaluation　method　of　bearing　capacity　considering　coupling　effects　can　reasonably　represent　the　degradation　process　of　bearing　capacity　under　the　action　of　fatigue　and　corrosion.　The　new　method　can　be　used　as　an　effective　reference　for　evaluating　the　bearing　capacity　of　RC　bridges　under　the　coupling　action　due　to　corrosion　and　fatigue.　©　2019,　Engineering　Mechanics　Press.　All　right　reserved.