Objective　River　deltas　are　sensitive　areas　of　land-sea　interaction　with　intense　human　activities,　and　continue　to　be　the　focus　of　international　research.　Methods　Based　on　grain-size　analysis　of　surface　sediments　in　the　Minjiang　River　delta　and　surrounding　waters,　this　study　discusses　the　evolution　of　the　contemporary　sedimentary　environment　in　the　area.　Results　It　is　shown　that　the　dominant　to-and-fro　tidal　current　within　the　estuary　gradually　changes　into　a　rotating　seaward　flow,　and　that　the　current　speed　decreases　from　the　subaqueous　delta　to　the　offshore　area.　The　sediments　in　the　study　area　are　mainly　sand,　silt　and　sandy　silt,　with　mean　grain-sizes　of　1.57　Φ,　6.7　Φ　and　5.62　Φ.　From　the　estuary　to　the　adjacent　coastal　shelf　area,　coarse-particle　content　decreases　and　fine-particle　content　gradually　increases.　In　addition,　grain　size　trend　analysis　indicates　that　the　sediment　delivered　by　the　Minjiang　River　is　transported　towards　the　E,　SE　and　NE　when　it　enters　the　estuary.　After　the　fine　sediment　passes　through　the　subaqueous　delta,　it　tends　to　be　transported　offshore　towards　the　SE　and　NE.　A　multivariate　statistical　analysis　of　sediment　composition,　grain　size　parameters　and　water　depth　integrating　the　geographical　location,　sediment　source　and　hydrodynamic　conditions　indicate　that　the　contemporary　sedimentary　environment　in　the　study　area　is　divided　into　four　sub-sedimentary　districts.　The　study　reveals　the　effect　of　different　influences　on　the　sedimentary　environment　and　demonstrates　its　response　to　human　activities.　Conclusions　The　results　of　this　study　provide　advice　for　estuary　resource　development　and　ecological　environment　protection.　©　2024,　Acta.　Sedimentol.　Sin.　All　rights　reserved.