To ensure the country’s precious coastal resources can be fully utilized,it’s crucial in wharf design to determine the reasonable layout and grade of a wharf project.Serveral tidal current and sediment mathematical models are built to imitate the schemes of a wharf with different fornt-line positions and grades,study the change of current,erosion and siltation of dreging area,and get the siltation volume of basin and channel.Finally,the recommended plan is presented by calculating and considering the factors of economic benefit,port development,as well as influence on the surroundings.