Guardrail collision detection device

The utility model provides a guardrail collision detection device which comprises a clamping plate used for being clamped on a guardrail plate, the clamping plate is of a U-shaped structure, a clamping plate is arranged on one side of the clamping plate, the two ends of the clamping plate are fixedly connected with the clamping plate through connecting screws, an electric appliance box is installed on the face, away from the clamping plate, of the clamping plate, and a circuit board is installed in the electric appliance box. A wireless signal transmitter is welded to the circuit board, a storage battery is installed in the electric appliance box and electrically connected with a travel switch through a wire, the travel switch is installed in the electric appliance box, and a through hole is formed in the face, facing the electric appliance box, of the clamping plate. A contact portion of the travel switch penetrates through the through hole, abuts against the surface of the guardrail plate and then is in a d