Grinding tool for bearing outer ring groove machining and using method of grinding tool

The invention discloses a grinding tool for bearing outer ring groove machining and a using method of the grinding tool. The grinding tool comprises a machining table, a sliding groove is formed in the machining table, an electric telescopic rod is arranged on the side, located on the sliding groove, of the machining table, and a grinding motor is arranged on the other side, located on the sliding groove, of the machining table; the output end of the electric telescopic rod is connected with a sliding plate. The clamping mechanisms on the first limiting rod and the second limiting rod are rotationally adjusted by being matched with the bearing outer ring so that the clamping mechanisms can be suitable for the bearing outer ring, then the first rolling shafts and the second rolling shafts in the clamping mechanisms are separated so that the clamping mechanisms can be used for clamping the bearing outer ring, and the clamping mechanisms of the grinding tool are suitable for clamping bearing outer rings with dif