In view that temporary navigation channels need to be opened up during the expansion of the navigable aqueduct of Binhai Hydro-junction Phase II for continuous navigation，following the requirements on channel network planning，we consider combining temporary navigation lock with permanent use. According to the requirements on route organization，current situation and prediction of ship type，freight volume prediction，and safe navigation of ships in the construction navigation period and permanent navigation period，we determine the scales of the navigation locks combining permanent and temporary use，the channel scale of the temporary connection section，and the navigation layout scheme. Then，we analyze the navigable flow conditions at different parts in terms of river topography，flow rate，and water level in different periods. The results show that the navigable flow conditions of the proposed layout scheme all meet the requirements. On the basis of the characteristics of the project，the key research directions in the next stage are proposed，and they can serve as a reference for the layout of similar navigation schemes combining permanent and temporary use.