On the basis of Tianjin city overall urban planning and industrial layout,we plan to construct the 300 000 ton waterway of Tianjin port and the second artificial island.The experimental research on the movement characteristics of flow and sediment and the environmental effects after implementation of the deepwater port and artificial island project is carried out by the field observation,variety,evolution analysis,as well as physical model and mathematical model.The results provide a scientific basis for the construction of the project.