Slip-ring polishing tool

The invention discloses a slip-ring polishing tool which comprises a base, a transmission part and a polishing part. The transmission part comprises a motor, a large belt pulley, a small belt pulley, a transmission shaft and a casting shaft sleeve and is arranged on a machine tool cutter bracket; the polishing part comprises a driving wheel, a driven wheel, a pin shaft, a shaft sleeve and a fixing arm; the casting shaft sleeve, the motor and the base are mutually assembled together; the large belt pulley and the small belt pulley are connected by a V belt; the large belt pulley is arranged on the motor; the small belt pulley is arranged on one end of the transmission shaft; the other end of the transmission shaft is provided with the driving wheel and connected with one end of the fixing arm; the driven wheel is fixed through the pin shaft and the shaft sleeve and arranged on the other end of the fixing arm; the driving wheel and the driven are both provided with a grinding belt; and surface of the driven whe