To meet the needs of water transportation，solve the problems such as difficult navigation conditions caused by the river section topography and river-related buildings in the entrance area of the ship lock approach channel，and ensure the safe passage of ships，this paper takes Shushan water conservancy project in Fu River as an example，and uses numerical simulation method to calculate and analyze the navigation conditions of the entrance area of the upstream approach channel of the lock.Aiming at the problem of bad flow pattern，the optimization scheme and measures are proposed，and the navigation conditions of the hub before and after the scheme are compared and analyzed.The research shows that the measures such as adjusting the plane layout of the lock are effective in improving the navigation conditions of the entrance area of the upper approach channel of the lock in the design stage.The research results can provide technical support for the navigation of Shushan water conservancy project in Fu River and other similar river section projects.