Regarding the problem that the ship lock of the Shuangqiao hub has the opening lock demand and needs to be jointly dispatched with that of the Xinjianghai River, this study takes the triangular gate and the lift gate as the service gate separately upon the analysis of the operation of domestic lift gates and the opening conditions of the lock. It compares the two schemes from the aspects of the plane layout, operation and maintenance, the navigation capacity of the lock, the quantities, and the costs in terms of technologies and economy. The results show that in the case of the lift gate, the cost is low, but the gate passing efficiency is low；hence, the lift gate is suitable for ship locks with a small water level difference, less heavy freight, and infrequent opening and closing of gates. The triangular gate, in contrast, has strong adaptability and can match the passing capacity of the ship lock of the Xinjianghai River, featuring reliable hoist operation and convenient operation and maintenance. Therefore, it can be generally recommended. The research result can provide a reference for the selection of a ship locks gate and the evaluation of the construction scheme.