Independent intellectual property rights of the digital tracking fast positioning technology, the original parallel positioning mechanism in practice, as long as the ultrasound to find the stone, through the ultrasound machine range function to measure the distance from the stone to the ultrasound probe surface, can make the shock wave wave source automatically move to the location of the stone. It is fast and convenient, and can be precisely adjusted at any time, thus greatly improving the hit rate of stone localization, which in turn improves the efficiency of lithotripsy and also protects the patient from additional injuries. This patented technology has been successfully transplanted to the German Dornier imported machine, creating a precedent for the transformation of imported medical equipment by nationals.