Differential cover machining device

The utility model discloses a differential cover machining device, and relates to the field of differential cover machining. The differential cover machining device comprises a machine shell, the lower end of the machine shell is rotationally connected with a connecting base, the lower portion of the connecting base is square and connected with a fixing base in a clamped mode, and the lower end of the fixing base is fixedly connected with a supporting shell; first through holes are evenly formed in the side wall of the supporting shell, the outer side of the supporting shell is sleeved with an outer cover, second through holes are evenly formed in the side wall of the outer cover, soft bristles are fixedly connected to the positions, staggered from the second through holes, of the outer side face of the outer cover, and the soft bristles and the outer cover are both made of silicon rubber. And carborundum balls are fixedly connected to the ends, away from the outer cover, of the soft bristles. According to th