Taking　the　typical　main　canal　of　the　Middle　Route　of　South-to-North　Water　Transfer　project　as　an　example,　the　numerical　simulation　study　on　the　variation　law　of　water　level　before　sluice　under　different　wind　conditions　is　carried　out.　First,　based　on　numerical　simulation,　mathematical　induction,　and　statistical　analysis　method,　the　influences　of　wind　speed,　wind　duration　and　wind　direction　on　water　level　fluctuation　are　put　forward　and　the　fast　prediction　formula　of　maximum　water　level　fluctuation　under　wind　influence　is　extracted.　Then,　the　feasibility　of　the　fast　prediction　formula　is　verified　by　the　actual　monitoring　data.　The　results　show　that:　(1)　the　duration　of　wind　has　little　influence　on　the　maximum　water　level　variation,　and　the　maximum　error　is　9.83　%;　(2)　the　maximum　water　level　amplitude　increases　with　increasing　wind　speed　and　decreases　with　increasing　wind　source　distance;　(3)　the　whole　water　level　variation　is　symmetrical　about　the　angle　α=180°,　and　0°　to　90°　is　a　period　of　maximum　water　level　variation;　(4)　the　error　between　the　calculation　result　of　the　fast　prediction　formula　and　the　measured　result　is　1.25　%,　which　shows　that　the　maximum　water　level　prediction　formula　is　relatively　applicable　to　open　channel　water　transfer　project.　These　research　results　provide　a　scientific　basis　for　routine　dispatching　of　water　conveyance　projects.　©　The　Authors,　published　by　EDP　Sciences,　2018.