Hunan Lishui Wushenggong beach is located in the 53 km channel of Songhu route，which is an important part of the waterway transportation system of Hunan province，and the waterway is rerouted improve its navigation standards and improve its shipping value.The paper focuses on the comprehensive analysis of the evolution trend and navigation characteristics of the study river section，and proposes the diversion scheme of Lishui Wushenggong beach waterway.After the implementation of the channel diversion，the paper studies the changes of navigation conditions of the river section，the changes of relevant parameters under different flow conditions and the lowest navigable water level，analyses the stability of the excavated channel by numerical simulation model test.The model test results show that after the implementation of the scheme，the water flow conditions and channel stability of the excavation area of Lishui Wushenggong beach meet the needs，and it is technically feasible to study the channel diversion of the river section，which can provide a reliably theoretical basis for the treatment of similar dangerous beaches.