Before the construction of Shatuozi diversion dike in Nianyuwan harbor area of Dalian port,the cross-flow of No.22 berth is larger and mooring condition of berths No.17～No.21 is so poor.In order to improve the hydrological condition,tidal flow mathematical model and physical model is set up to study flow field as while as wave physical model is set up to study waves.On the base of comprehensive comparison flow and waves factors.this paper analyzes the layout and hydraulic structures of Shatuozi diversion dike project,and explores the whole thought and research method of artificial measures to improve the hydrologic condition of port construction,which may serve as reference for other similar projects.