Taking the 34 m gate of the expansion and reconstruction project of Yuxi first ship lock as the research object,we propose a new type of anti-collision structure system of triangle gate,which is composed of aluminum honeycomb panel and rigid supporting bars. We establish the finite element model of the new anti-collision structure system,carry out the impact simulation,and compare the new anti-collision structure system with the traditional rigid anti-collision structure system. The results show that the new anti-collision structure system works well under the calculation condition,and there is no plasticity. Compared with the traditional rigid anti-collision structure,it has good advantages in energy dissipation,lightweight,and replacement.