Road guardrail cleaning machine

The invention provides a road guardrail cleaning machine, comprising a locomotive and a cleaning device installed at the side of the locomotive. The locomotive is provided with a power source; and the cleaning device at least comprises a lifting mechanism, a rotating mechanism, a telescopic mechanism, a turnover mechanism, a gantry clamping mechanism, a self-adapting mechanism and a cleaning mechanism. The power source is connected with the lifting mechanism by a transmission mechanism; the rotating mechanism is fixedly installed on the lifting mechanism; a sleeve seat is installed on a rotating platform of the rotating mechanism; one end of the front arm of the telescopic mechanism is sleeved in the sleeve seat while the other end is fixedly connected with the turnover mechanism; the turnover mechanism is connected with a transverse beam of the gantry clamping mechanism; two ends of the transverse beam of the gantry clamping mechanism are respectively connected with side arms which are respectively provided