The navigable flow conditions in the entrance area affect the navigation safety of ships.Hence，this study constructs a generalized numerical model according to the characteristics of the downstream entrance area of the sharp bend channel.It explores the influence of the number，the arrangement angle，and the relative spacing of diversion piers on the navigable flow conditions in the downstream entrance area of the ship lock.In addition，it builds a two-dimensional mathematical model on the basis of the navigation and power junction located in the sharp bend channel to verify the arrangement laws of diversion piers.The results show that reasonable arrangement of diversion piers can greatly improve the flow conditions in the entrance area.When the number of diversion piers is increased appropriately，and the spacing and length of diversion piers are equal，the improvement effect on navigable flow is more prominent.When the direction of diversion piers is parallel to the route，the flow conditions are better.