Road guardrail with shock -absorbing function

The utility model discloses a road guardrail with shock -absorbing function, comprising a support, two first bar spouts have been offered to the up end symmetry of support, the utility model disclosesan add the slide bar, connecting plate and rubber slab isotructure, the support inlays on the medium line of road, when this device of vehicle collision, slide bar and sleeve remove to branch, the kinetic energy of messenger's vehicle turns into the internal energy of second spring and third spring, when third spring compressed arrives the certain degree, the slide bar no longer removes, then, the vehicle impact connecting plate, the rubber slab has played certain cushioning effect, and the connecting plate is close to branch rotation, let first spring compressed, let the kinetic energy of vehicle further turn into the internal energy of first spring, and simultaneously, because moving down of piston, let the gasbag aerify, the cushioning effect has been played, great absorption the kinetic energy of vehicle, the