To protect Wanzhou Yangtze River Highway Bridge better, the arch-type self-floating lifting water upper anti-collision device is invented by Chingqing Jiaotong University.It is a new type of anti-collision device, made of guide well, collision zone and buoy. The collision zone plays an important role of preventing ship colliding Wanzhou Yangtze River Highway Bridge. This paper demonstrates two different structures of collision zone. And this paper analyzes its force characteristics of structure and collision avoidance effect after ship collision adopting finite element software ABAQUS. At the same time, these two kinds of collision zone are compared in construction technology and maintenance difficulty. It found that full steel construction takes advantages over concrete filled steel tube construction. Therefore it is scientific and reasonable to choose full steel construction as the structural form of collision zone of arch self-floating lifting water upper anti-collision device.