Wrecker back supporting device

The invention discloses a wrecker back supporting device, which comprises two back supporting fixing tubes, an ascending and descending vertical sleeve and a transverse tube, wherein the two back supporting fixing tubes are symmetrically and fixedly arranged on a sub vehicle frame of a wrecker, the ascending and descending vertical sleeve is connected with the back supporting fixing tubes through an upper pin shaft, a hydraulic oil cylinder and a lower pin shaft, the bottom end of the ascending and descending vertical sleeve is vertically and fixedly connected with one end of the transverse tube, the upper part of the other end of the transverse tube is open, a folding sleeve is arranged in the open space and is connected with the transverse tube through a fixing shaft arranged in the transverse tube, and a folding supporting device is arranged between the ascending and descending vertical sleeve and the folding sleeve. The wrecker back supporting device has the advantages that the traditional back supporting