This paper focuses on the new trend of the evolution of the middle and lower Yangtze River waterway continuously washed by the clear water discharged from the Three Gorges Reservoir，analyzes the channel stability after the implementation of Heishazhou goose-head curved branching waterway control project and the difference during the research stage，and expounds the influence of clear water scour on the channel regulation idea of the evolution of the curved branching waterway. The results show that under the condition of the sudden decrease of sediment inflow in the upstream，the clear water scouring increases the sediment transport capacity of the branch on the convex bank side of the branching reach，the channel continues to scour，and the navigation depth，navigation width，and diversion ratio increase，which belongs to the developed branch. Therefore，the actual engineering effect is better than the model test results，which accumulates experience for the follow-up treatment of the similar curved branching reach.