Combining with the conceptual design of the reconstruction and extension of the sector lock gate of the first line ship lock in the Yuxi River，we propose a new type of double energy-consuming anti-collision system with aluminum foam sandwich panel and supporting bar with spring to improve the anti-collision performance of the sector lock gate. By the numerical simulation of the ship impact on a new anti-collision system of the sector lock gate，we know the mechanical characteristics and energy conversion law of the anti-collision system. Through the parameter analysis of the aluminum foam sandwich panel thickness and the stiffness of supporting bar with spring and comparison with the traditional anti-collision system，it is shown that the combined use of aluminum foam sandwich plate and supporting bar with spring can reduce the weight of the anti-collision system and reduce the impact force of the ship.