Abstract: A repair machine for compact disk is used for cleaning, maintaining, and repairing compact disks. The processing procedure is basically a mechanical method by: placing a scratched compact disk on a CD turntable of the repair machine, grinding it with a grinding wheel and dripping grinding agent on the grinding wheel continuously. The grinding agent is classified in three categories: coarse, middle, and fine (polishing), for trimming scratch to renew a marred compact disk.