To simplify a work for replacing and cleaning a used ginding belt.

A cloth belt cleaning system is constituted of ball grinding and lifting machines 10a-10d, sending devices 30a-30d, returning devices 50a-50d, cleaning machine 10, and controller 90. The machines 10a-10d lift game balls while the balls are ground by being pushed into between a cloth belt and a leather belt, which leather belt is being lifted. The sending devices 30a-30d send the cloth belt to the machine 70 from upper and lower rails 41a-41d in predetermined timing. Thereafter a spare cloth belt waiting in the devices 50a-50d is introduced into the rails. The machine 70 conducts washing, rinsing, dehydrating, and drying when a predetermined number of cloth belts have been sent from the sending devices 30a-30d. The devices 50a-50d return the cloth belts to the machines 10a-10d after the belt are cleaned.