Aiming at the complex navigation environment in the fluctuating backwater section of the upper reaches of the Yangtze River during the ebb and flow period of the Three Gorges reservoir,this paper studies the comprehensive navigation characteristics of the shoal by taking the remediation of the regulation of Jiaoshizi channel in Guangyangba as an example.This paper determines the self-propelled beach target of the 5,000 tons ship type by ship resistance calculation method,obtains the cause of the risk of the river section through the physical model test,and proposes the overall management ideas and the beach risk remediation plan.The regulation effect shows that the navigation channel scale has reached the navigation design standard after the implementation of the project,which can meet the navigation flow conditions of the 5,000 tons ship.