Because of the large transverse currents in the wharf apron area,the ships can easily bang into the wharf or the mooring ropes break.Therefore,studying the flow fields in the wharf apron area is important for the reasonable selection of the wharf axis as well as the successful berthing.On the basis of pile group resistance,the flow field around the high-piled wharf in Caofeidian first phase and third phase ore terminal projects are simulated with the triangular net hydrodynamic modules(FM modules)in Mike21 software.Compared with the measured velocity and flow direction,the influence parameters of pile group in the model are determined.Moreover,the effect of the construction of pile wharf on the surrounding sea area is researched by the method,also the method can calculate and analyse the transverse currents in the wharf apron area.It has been proved to be an easy and high-effective method and the effect of the construction of high-piled structure on the large sea area is reasonable.It is helpful to the reasonable selection of the wharf axis as well as the successful berthing.