Aiming at the problem of poor flow condition and difficulty in meeting the requirements for safe passage of ships under the combined influence of three-dimensional helical flow and flow characteristics in the entrance area of ship lock in the curved river,we put forward that the engineering measures should be moved up ahead,and the “point” type should be changed to the “line” type.By adjusting the river regime,the adverse effects of helical flow in the lock entrance area of the curved river should be weakened,and the slow flow area in the entrance area should be constructed,supplemented by local engineering,so as to further improve the lateral velocity and reflux velocity in the entrance area to ensure the safe passage of the ship.