Liyushan Waterway is located in the section of the Yangtze River trunk from Wuhan to Anqing.Due to the development of the south trough flushing,the flow capacity of the north trough is reduced and the flow is dispersed.So the central beach of Huanglianzhou is extremely unstable and the waterway condition of the north channel is deteriorating.The waterway regulation project was carried out in 2015 for curbing the adverse development.To study the implementation effect of the regulation project,the variation of the split ratio of the north trough and south trough is analyzed by comparing the data of numerical model,physical model and the observation data before and after the implementation of the project.The results show that the split ratio of the north channel during low water has significantly increased after the project.The project curbs the erosion trend of the central beach of Huanglianzhou,keeps the stability of the river section and improves the conditions of the north channel.The goals of the regulation project are achieved.