Climate　change　has　exacerbated　the　frequency　and　magnitude　of　extreme　rainfall,　which　has　led　to　the　perpetuation　of　flooding　as　a　hazard　to　humans　and　society.　China　has　begun　to　consider　introducing　Flood　drainage　rights　(FDR),　a　sustainable　flood　control　measure,　into　non-engineering　measures　as　a　complement　to　engineering　measures　for　flood　control.　FDR　represent　the　right　of　regions　to　discharge　regional　floodwaters　caused　by　extreme　rainfall　into　the　river,　and　are　the　primary　means　of　controlling　the　amount　of　floodwaters　from　regions　when　regional　flood　capacity　is　exceeded.　However,　existing　studies　on　quantitative　FDR　allocation　still　have　limitations,　and　some　previous　methods　have　resulted　in　allocation　schemes　that　are　not　entirely　reasonable　and　fair　because　they　do　not　comprehensively　consider　the　influencing　factors　of　FDR　or　the　allocation　method　is　unreasonable.　This　paper　explores　the　impact　of　flooding　on　rural　and　agricultural　areas.　We　incorporate　the　factors　of　agricultural　economy　and　security　and　construct　a　system　of　the　allocation　indicators　of　FDR　composed　of　five　principles:　Natural　Environmental　Endowment,　General　Economic　and　Social　Development,　Agricultural　Economy　and　Security,　Macro　policy　regulation,　and　Respect　for　Historical　Background.　Second,　considering　the　influence　of　expert　judgment　and　data　of　different　time　nodes　on　the　allocation　of　FDR,　we　introduce　the　concepts　of　expert　weight　and　time　weight　into　the　allocation　model　of　FDR,　and　construct　a　new　set　of　framework　for　the　allocation　of　FDR,　i.e.,　＂[(expert　weight　+　subjective　weight)+(time　weight　+　objective　weight)]+decision　making　model　＂.　To　reduce　the　loss　of　information　during　the　transformation　of　subjective　judgments,　we　also　introduced　triangular　fuzzy　numbers　for　the　transformation　between　expert　judgments　and　numbers.　Finally,　we　take　the　five　provinces　in　the　middle　and　lower　reaches　of　the　Yellow　River　as　an　example.　Using　the　data　from　2010　to　2021,　we　obtain　the　final　allocation　scheme　(proportion)　of　FDR　as　Henan　(33.26%)　＞　Shaanxi　(23.08%)　＞　Inner　Mongolia　(21.31%)　＞　Shanxi　(14.44%)　＞　Shandong　(7.91%).　On　this　basis,　this　paper　utilizes　sensitivity　analysis　and　comparative　validation　to　demonstrate　the　rationality　and　effectiveness　of　the　method,　and　identifies　several　indicators　that　have　a　greater　impact　on　the　results　of　the　allocation　of　FDR.　FDR　can　form　part　of　a　set　of　integrated　flood　management　system　together　with　flood　control　projects,　which　greatly　alleviates　the　drainage　conflicts　arising　from　flooding　caused　by　extreme　precipitation.　Under　extreme　rainfall　conditions,　FDR　improves　drainage　efficiency　and　minimizes　the　overall　damage　caused　by　flooding　in　the　watershed.　This　study　can　contribute　to　the　sustainable　development　of　the　watershed　and　provide　a　reference　for　the　promotion　and　utilization　of　sustainable　flood　control　measures.