Potent portable internal shock-wave lithotripsy instrument, using the principle of safe and efficient microburst and hydroelectric effect, the electrical pulse through the discharge electrode, endoscopically guided treatment of bile duct stones, while the bile duct wall and other soft tissue damage is minimal.The series adopts new technologies such as pulse excitation, electrolyte discharge, directional shock wave and flexible fine-diameter guide electrode.The clinical application has proved that all stones visible by choledochoscope can be crushed and removed at one time without any side effects such as visible damage, which significantly improves the treatment level of hepatic and biliary stones and enriches the treatment means. It is a new lithotripsy equipment for gallbladder-protecting litholithotomy.