Heavy truck side hydraulic spare wheel bracket, which include: frame connected to the frame longitudinal beam, the hydraulic cylinder hinged on the frame and can rotate, sliding bracket by rolling bearing to set on the frame and can slide around, slide connecting rod hinged on the sliding bracket and can rotate, hydraulic cylinder, the spare tire mounting bracket and the slide rod hinged together, spare tire mounting bracket with slide pin shaft and the bearing of the connecting rod hinged up, slide one end of the connecting rod hinged on the sliding bracket and can rotate, the spare tire is fixed by bolts on the spare tire mounting bracket, the interlock device is hinged on the sliding bracket and fixed, and can realize the sliding bracket Locking and separation with the slide connecting rod, the first interlocking device is connected with the sliding bracket and can realize the positioning of the slide connecting rod and the locking and separation with the spare tire mounting bracket, the fixing pin can fix the frame and sliding bracket together. Pack up