In order to meet the needs of Xiamen Port construction,we propose the plan of planning Haicang deepwater port on the north area of Jiulongjiang Estuarine Bay.This area’ s natural water depth is only from 1.5 m to 5.0 m,the construction of the deepwater port should be excavated from 12 m to 15.5 m,and the feasibility of the planning depends on the siltation strength of the port.Through the analysis of the model test results and field data,we point out that with the westwardly development of the quay,the height difference between the channel and the river bottom gradually increases,and the flow velocity is slow down and the sediment deposition is caused in the harbor basin.We also need to consider the influence of the current flowing to channel “brush bottom”induced siltation.According to the characteristics of various siltation,we calculate the sediment deposition rate in Haicang Port.It is believed that it is feasible to build deep-water ports in Haicang Port area.