Flutter　analysis　that　governs　the　bridge　aerodynamic　instability　is　crucial　during　the　wind-resistance　design　period　of　long-span　bridges.　However,　randomness　existing　in　the　wind　load　and　structure　can　bring　about　obstacles　in　the　determination　of　the　flutter　onset　and　thus　can　lead　the　bridge　to　precarious　situations.　Probabilistic　analysis　considering　the　uncertainties　from　different　sources　is　necessary　for　the　risk　assessment　of　bridge　flutter.　In　this　paper,　a　framework　for　probabilistic　analysis　of　bridge　flutter　is　developed.　Bimodal　coupled　flutter　serving　as　the　classical　flutter　problem　is　considered.　In　the　probabilistic　analysis,　modal　damping　ratio　and　critical　wind　speed　are　reformulated　with　generalized　flutter　analysis,　based　on　which　their　moments　are　estimated　by　adopting　point　estimate　method.　The　proposed　framework　is　validated　with　experimental　data.　Results　show　that　both　the　accuracy　and　efficiency　can　be　retained.