The invention belongs to the technical field of vehicle accessory machining, and discloses an auto spare part automatic turnover sand blast apparatus. The auto spare part automatic turnover sand blastapparatus comprises a rack and a sand blast mechanism, a rotating shaft is rotationally connected to the rack, the central axis of the rotating shaft is parallel to the horizontal face, the sand blast mechanism comprises a sand storing box, an air compressor and a hollow stretchable rod, an air outlet pipe is communicated between the air compressor and the sand storing box, an air outlet pipe iscommunicated between the sand storing box and the stretchable rod, one end of the stretchable rod is connected to the rack, the other end of the stretchable rod is connected with a sand blast plate, and a push plate is connected to the sand blast plate; and two hollow working tables are arranged on the side face of the rotating shaft in the axial direction, the two working tables are vertically arranged, a plurality of air holes are formed in the working face of each working table, a gear is coaxially connected to the rotating shaft, a rack is meshed to the gear, air cylinders are connected tothe two ends of the rack and are provided with openings, and soft pipes are connected between the openings and the air holes. By means of the technical scheme, the problem that in the prior art, manual turnover is needed when sand blast treatment is carried out on workpieces is solved.