Abstract: It is difficult to canalize project on multi-branch rivers.The project layout,route planning and navigation flow conditions and other aspects need comprehensive consideration.Taking the Anrenfu navigation-hydropower project of the Qujiang River in Zhejiang Province for example and based on the overall physical model,the route planning,channel regulation,operation scheduling and other key technical problems of the project at a multi-branch river is studied.Comparing the flow conditions for a number of routes in the upstream,this paper gives the best route and ship navigation safety conditions;According to the characteristic of the channel transition of the bank on downstream channel,the optimal layout scheme and regulation range of downstream channel is proposed.By means of reasonable operation and scheduling,the whole navigation problem is perfectly solved.