Laparoscopic cholecystectomy (LC) has outstanding advantages such as less trauma, faster recovery, shorter hospital stay, less pain, and cosmetic, etc. It is recognized by the medical profession and the majority of gallstone patients, and has become the preferred surgical procedure for the treatment of gallbladder stones, benign gallbladder tumors, and cholecystitis. As LC surgery is commonly carried out in hospitals at all levels, the trend of doctor-patient disputes caused by bile duct injuries occurring in LC surgery is on the rise, which should cause everyone to be alert. The cases of extrahepatic bile duct injury in our lumpectomy surgery since LC was carried out in 1996 to December 2009 and after LC in external hospitals are analyzed as follows. 1, general information: our hospital lumpectomy surgery since 1996 since the development of LC to December 2009, a total of more than 5000 cases of LC, age 8-94 years. There were 16 cases of extrahepatic bile duct injury (including 5 cases transferred from outside hospitals), including 3 cases of cauterization of the common bile duct, 2 cases of cauterization of the common hepatic duct, 2 cases of cauterization of the right hepatic duct, 2 cases of postoperative jaundice caused by titanium clamps of the bile cyst duct too close to the common bile duct and compression of the common bile duct by the titanium clamps, 4 cases of transection of the common bile duct and the lower end of the common hepatic duct, and 3 cases of transection of the vagus bile duct. 2. treatment methods: abdominal drainage; Roux-y anastomosis of common bile duct jejunum; common bile duct exploration and T-tube drainage; end-to-end anastomosis of common bile duct and T-tube stent drainage; ligation of vagus bile duct and removal of titanium clips, etc. In one case, the defect was formed because the bile duct wall defect was too large and the anterior wall could not be sutured after the T-tube stent was placed, and the anterior wall defect was repaired by covering with hepatic round ligament and the T-tube stent of common bile duct was drained. t-tube stent drainage for 6~9 months. 3. Results: 16 patients were followed up clinically for 2 to 12 years, and no cases of abdominal pain, fever, jaundice and other biliary stricture symptoms have been found, and all of them returned to normal life and work. 4,? Discussion: Extrahepatic bile duct injury is one of the most serious and dangerous complications of LC surgery with a high incidence. the incidence of bile duct injury in LC surgery is reported to be about 0.6% abroad and 0.32% in China. In patients who underwent LC surgery, the common hepatic duct and common bile duct are generally not thickened, and their diameters are mostly below 0.8 CM, especially in patients with gallbladder polyp-like lesions, the common bile duct is generally small, and the common bile duct is very free, so pulling the gallbladder can easily cause the common bile duct to become angular, and the common bile duct transection injury can easily occur, and three of the four cases of common bile duct transection injury in this group are patients with gallbladder polyp-like lesions. Once extrahepatic bile duct injury, timely surgical treatment is the only treatment. For this reason, as far as possible, bile duct injury is found during surgery and treated in time, and bile duct injury is found after surgery and then treated, which greatly increases the difficulty and risk of surgery and easily leads to surgical failure and, moreover, easily leads to medical disputes. In LC surgery, especially in patients in the acute inflammatory phase, and those with unclear gallbladder triangle anatomy, dense adhesions, gallbladder-bile duct filled stones, and Mirrizi syndrome, one should decide whether to continue laparoscopic surgery according to one’s lumpectomy skill level, and should not insist on it reluctantly, and it is not a wise choice to turn on the abdomen when necessary. The gallbladder triangle should be dissected to identify the “three ducts and a pot belly”, as close as possible to the gallbladder, following the principle of “better to hurt the gallbladder than the ducts”, and avoid strong electrocoagulation or electrocutting of large bundles of any tissues, and give titanium clamps to close the duct-like tissues after they are identified and then cut off. The titanium clamping of the bile cyst duct should be done with appropriate relaxation of tension on the gallbladder to restore the common bile duct to its original position as much as possible, to avoid the common bile duct becoming angular and being clamped by the titanium clamps, which was the case in 2 patients in this group. damage to the bile duct and vagus bile duct. Once the extrahepatic bile duct is injured, it is difficult to repair; improperly handled, the follow-up problems are many and complicated, causing great pain and harm to the patient, and can even endanger the patient’s life. The treatment methods after the occurrence of bile duct injury include bile duct repair, end-to-end anastomosis repair of severed ends and Roux-y anastomosis of bile duct jejunum. In principle, the upper and lower severed ends of the bile duct should not be freed too much to avoid affecting the blood supply to the bile duct wall and to ensure that the anastomosis is tension-free. Bile duct transection injury should be repaired by end-to-end bile duct anastomosis as much as possible, which restores the normal physiology of the bile duct channel and has fewer postoperative complications. The longest bile duct injury defect in this group is 2.5CM, the common hepatic duct and common bile duct together with the surrounding tissues are made suitable for freeing and loosening, and the two severed ends are pulled together with little tension, and the common bile duct and common hepatic duct are end-to-end anastomosis is performed, and the patient recovers smoothly after surgery. If there is tension, the stent should not be forced to be sutured, rather let the anterior wall of the bile duct at the repair site be defective, and cover the repair with hepatic round ligament or other surrounding tissues (in one case of this group, the diameter of the common bile duct was only 4 mm by preoperative ultrasound, and the anterior wall of the bile duct could not be sutured after the stent was placed, so the repair was covered with hepatic round ligament). The bile duct repair anastomosis was done with absorbable thread and single layer interrupted suture. The bile duct stent needs to be placed for 6 to 9 months to prevent the occurrence of anastomotic stenosis. The prognosis for extrahepatic bile duct injury is generally good as long as it is detected intraoperatively and treated promptly and appropriately.