Polishing device for motor driving shaft

The utility model relates to the technical field of driving shafts, and discloses a motor driving shaft polishing device which comprises a machining table, the top end of the machining table is fixedly connected with a polishing mechanism, the polishing mechanism comprises a first box body, the first box body is fixedly connected to the top end of the machining table, one side of the first box body is fixedly connected with a first motor, and the other side of the first box body is fixedly connected with a second motor. The output end of the first motor is fixedly connected with a first rotating shaft through a coupler, one end of the first rotating shaft is fixedly connected with a threaded rod, one end of the threaded rod is fixedly connected with a bearing, the outer wall of the threaded rod is movably connected with a threaded block, and the top end of the threaded block is fixedly connected with a telescopic rod; and the top end of the telescopic rod is fixedly connected with a grinding block. According