Highway anti-collision device

The invention relates to a highway anti-collision device, and belongs to the technical field of a highway guardrail. The highway anti-collision device comprises an anti-collision buffer unit, connection units and uprights; the anti-collision buffer unit is positioned at one side close to a highway and is connected with the uprights by a plurality of connection units up and down; the anti-collisionbuffer unit consists of a pressure reduction plate, sliding blocks, damping springs, a base, tension springs, screws, a buffer layer and reflective stripes; the pressure reduction plate and the buffer layer are of a semi-circular shape; flat straight sections are arranged at both the top and the bottom of the pressure reduction plate and the buffer layer, and the pressure reduction plate and thebuffer layer are fixedly connected with joints with the sliding blocks by the screws; the base consists of chutes, protrusions and limiting baffles. According to the invention, an impact force of a vehicle which is out of cont