Trunk whitewashing machine

The invention discloses a trunk whitewashing machine. A material tank is arranged on a vehicle body, the material tank is connected with a self-adaptive spraying clamp through a conveying device, the self-adaptive spraying clamp comprises a front clamping head, a rear clamping head and a clamping rod, the front clamping head and the rear clamping head are hinged to one end of the clamping rod and form a circular ring in a closed state, The clamping rod is provided with an opening mechanism enabling the front clamping head and the rear clamping head to be opened and closed around a hinge point, the front clamping head and the rear clamping head are provided with a plurality of spraying nozzles and an extending end in a center rotating array mode, a telescopic rod is arranged in the extending end in a sliding mode, the extending end is internally provided with a pressure spring enabling the telescopic rod to extend out, the tail end of the telescopic rod is provided with a guide wheel, a pressure sensor is arra