Whether choledochotomy is a major surgery or not is determined according to whether or not liver tissue is removed. If only the choledochotomy is performed to remove the stone during the stone removal process, it is not a major surgery, and if part of the liver tissue is removed, it is considered a major surgery. 1. If the number of stones in the common bile duct is small, the size is small, and the scope of infection is narrow, the stones can be taken out and removed only by laparoscopic incision of the common bile duct, and no liver tissue is removed. At this time, there is little damage to the human body and it is a minor surgery. 2. For large number of stones in the common bile duct, large size of stones with adjacent tissues and organs infected, there is a possibility that the stones may not be removed completely when the common bile duct is cut open to remove the stones, and then it may be necessary to remove part of the liver tissue. Both the surgical procedure and the risk of surgery will be increased, and this is considered major surgery. For choledochotomy and lithotripsy, you need to go to a specialized hospital, complete the relevant examinations, and choose the appropriate surgical method under the guidance of the attending doctor.