In recent years,the navigation environment of Baoshan north channel in the south and north port branch of the Yangtze River estuary deteriorates due to the siltation of the sand head of Xinliu River.In order to find an effective solution,this paper applies geographic information system（GIS）to analyze the river regime change of this reach in recent 10 years,and studies the channel pattern adjustment scheme.The results show that the channel volume,thalweg plane and isobath of the water area change obviously,the sand bag of the Xinliu River shrinks,and the sand head of the Xinliu River gradually silts up and moves towards the channel direction.At present,the navigation environment can be improved by fine-tuning the channel pattern.