The waterway between the Three Gorges and Gezhouba dams is affected by the combined effects of flood season flow and reservoir regulation,resulting in high flow velocity,chaotic flow patterns and poor navigation conditions.Under high flow conditions,it is difficult for ships to navigate under large flow and needs to restrict passage,which has become a controlling river section that restricts the improvement of navigation efficiency of the two dam hubs.The deep water rapids and dangerous shoals between the two dams are mainly located at the throat of the main waterway and cannot be treated through conventional remediation methods.In this paper,by means of blasting rocks and other methods to adjust the riverbed shape,reduce the steep rise of the riverbed,expand the water flow area,the typical navigation obstruction beach “four beaches and one bend” is regulated.According to the actual regulation effect of Liantuo section,the regulation effect of this section is obvious,and the flow condition of the channel is improved significantly