Rear drive axle stabilizing mechanism of harvester

The utility model discloses a rear drive axle stabilizing mechanism of a harvester. The rear drive axle stabilizing mechanism comprises a supporting beam fixedly connected to a vehicle body of the harvester. The supporting beam is hinged to the rear drive axle through a longitudinally-arranged middle shaft. A pair of rear axle pull rods are arranged in a bilateral symmetry manner by taking the axis of the intermediate shaft as a reference; one end of the rear axle pull rod is connected to the rear drive axle, and the other end of the rear axle pull rod is connected to a butterfly pin shaft which is coaxially arranged with the intermediate shaft; the butterfly pin shaft comprises a pin shaft part and a butterfly seat part; the connecting points, connected to the butterfly seat part, of the pair of rear axle pull rods are bilaterally symmetrical by taking the axis of the pin shaft part as a reference; and the pin shaft part is rotatably inserted into the vehicle body. A new connecting point is added to the rear