We establish the physical model of Datengxia water conservancy project,verify the layout scheme of the upper entrance gate of Datengxia water conservancy project experimentally,and use the layout of the entrance channel of the upstream approach channel and the analysis of nearby terrain to optimize the engineering scheme.By adjusting the curvature and radius of the center line braking section,changing the connection form between the entrance gate and the upstream main channel,increasing the navigation piers and optimizing the ground elevation in the vicinity of the entrance area,etc.，the flow condition in the entrance area can meet the navigation requirements.The engineering quantity can be saved.