The invention provides a device for sleeving a bearing ring. The device comprises a frame, a feeding mechanism, a ring sleeving mechanism and a discharging mechanism, wherein an outer ring storage plate and an inner ring storage plate are arranged on the frame; the outer ring storage plate and the inner ring storage plate are connected with each controllable motor respectively; the outer ring storage plate and the inner ring storage plate are horizontally arranged; the inner ring storage plate is arranged under the outer ring storage plate; storage holes are formed on the outer ring storage plate and the inner ring storage plate, are uniformly distributed along peripheries, and comprise accommodation chambers and brackets; an outer ring storage hole is necessarily formed on the outer ringstorage plate and is overlapped with an inner ring storage hole which is formed on the inner ring storage plate up and down to form a ring sleeving channel; a through hole which allows an inner ring to pass through is formed on the bottom of the outer ring storage hole; a ring sleeving cylinder is positioned under the ring sleeving channel; a push rod of the ring sleeving cylinder is fixedly connected with a push block which can push a ring in the ring sleeving channel upwards till the ring leaves the outer ring storage plate, wherein the length of the push block is greater than the diameter of the storage holes; and a through groove which can allows the push block to pass through is formed on a side wall of the storage holes. The device for sleeving the bearing rings has the advantages of simple structure, quick model replacement, wide application range, rare occurrence of machine fault, and low cost.