Due to lack of research on the construction condition of the artificial deep-water channel in the radial sand ridges area of the south Yellow Sea,we analyze comprehensively the construction condition of Lyusi artificial 100 000 DWT deep-water channel based on the research on water flow condition,sediment condition,seabed evolution and siltation intensity.The results show that the water flow is strong and seabed is stable.Furthermore,the results of the trial dredged channel observation and back silting prediction show that the siltation intensity is not serious under normal weather,and even under 5-year frequency wind.So it’s basically suitable for constructing 100 000 DWT deep-water channel at the southern channel of Xiaomiaohong waterway.