The invention relates to an automatic overturning device for leather rings. The automatic overturning device for the leather rings comprises a workbench, a feeding unit and an overturning unit. The feeding unit is positioned in front of the overturning unit. A vibrating plate automatic feeding machine is adopted in the feeding unit. Stitched leather rings are placed in batches in advance in a vibrating plate of the vibrating plate automatic feeding machine, and when the vibrating plate automatic feeding machine works, the leather rings are orderly discharged from a discharging channel. The overturning unit is used for overturning the leather rings, so that the inner surfaces of the leather rings are overturned outwards to become the outer surfaces, and the leather rings which are overturned inwards and outwards finally becomes finished product belt rings. The automatic overturning device for the leather rings can realize the automatic discharging and overturning of the stitched leatherrings, so that the leather rings are machined into the finished product belt rings, and high machine efficiency is achieved.