Collision-resistant elastic protective device for highway guardrail

The highway guardrail anti-collision elastic protection device comprises a guardrail main body, a sliding opening and a damping spring, an outer plate is arranged in the collision end face direction of the guardrail main body, the outer plate is slidably connected to the guardrail main body through a sliding rod, a rear seat is arranged at the end of one side of the sliding rod, a top head is slidably connected to the rear seat, and the damping spring is arranged on the sliding opening. A push seat is arranged in the moving direction of the ejector head, a guide rod is arranged on the push seat, a rubber head is arranged on the guide rod, a through opening is formed in the portion, corresponding to the rubber head, of the guardrail body, a sliding opening is formed in the guardrail body, a sliding rod of an outer plate can be connected into the sliding opening, a damping spring is connected to the sliding rod in a sleeved mode, and therefore buffering and damping of the outer plate are achieved. The through o