This paper proposes an expansion plan for the port pool in the Qiwei operation area of Taixing port area,Taizhou Port,addressing issues such as limited capacity of the bulk cargo terminal and mismatch of berths between rivers and seas.The feasibility of the plan is verified from the perspectives of navigation safety and tidal sediment by using ship AIS data analysis and two-dimensional tidal sediment numerical models.The results show that after the expansion of the inner harbor basin,there is a certain mutual influence between the ships in the harbor and the navigation environment in the nearby water area.At the same time,a small amount of silk is inevitably generated at the entrance and inside of the harbor.However,after taking certain navigation risk mitigation measures,strengthening sediment monitoring and timely dredging,the proposed plan is feasible.This plan can effectively improve the berthing level and operational efficiency of ports without adding new shorelines or land resources,and its planning approach can provide reference for the renovation of other ports with transportation capacity gaps and limited shoreline resources.