Accurate　detection　of　water　surface　boundary　is　an　important　condition　for　autonomous　navigation　of　unmanned　surface　vehicle(USV),　but　the　existence　of　water　reflection　becomes　one　of　those　difficulties　during　the　detection.　In　order　to　solve　this　problem,　this　paper　proposes　to　use　the　phase　correlation　algorithm　to　determine　the　location　of　shorelines　in　inland　river,　the　precision　of　phase　registration　is　improved　by　feature　extraction　under　constraint　conditions,　and　the　inclination　angle　of　shoreline　is　determined　by　affine　transform　angle　of　feature.　The　algorithm　could　overcomes　the　influence　of　water　reflection　during　the　detection　of　shorelines.　©　2019　IEEE.