Abstract: Based on analysis of field data, a 2D water-sediment mathematical model for Lianyungang waters is developed to carry out studies of the entrance layout scheme of the encircled basin of Xuwei port from flow and sediment movement aspects. As there have a gentle coastal slope, and there is a greater range acted by the breaking zone waves during windy season, siltation sediment suspended by breaking wave in the breaking zone can be carried by the rotary tidal flow to a long distance, even to the basin or the outer channel. So a double-embay pattern should be chosen as the geometry for the basin in order to reduce siltation in the basin and outer approach under the windy conditions. And the entrance should be located at the place -5 m beyond the breaking wave area to make a reduction of the suspended sediment carried by the breaking wave into the basin and the outer approach. Besides, the width of the entrance should not be too narrow to concentrate intensity flow, especially in primary stage. A V-shaped entrance is recommended to ensure vessels to enter and leave the port safely. The suggestion mentioned above is accepted by the design institution in their construction schemes, therefore it can be taken as a reference for the layout scheme research in the similar ports in the future.