The most common complication after bile drainage surgery is bile duct stricture, as common bile duct dissection, lithotripsy, and biliary exploration are usually required. A T-drain is left in place to drain the bile outside the body to avoid leakage of bile into the abdominal cavity and the secondary occurrence of peritonitis. Over time, this may lead to local stenosis of the bile duct and, in severe cases, to secondary biliary stasis and complications of infection. In addition, bile can easily leak out into the abdominal cavity and form a restrictive peritonitis, which can also lead to fever in the patient. There is also a tendency for prolonged bile drainage to lead to disturbance of the internal environment with electrolyte disturbance and acid-base imbalance. Therefore, during the treatment period, it is also important to pay attention to the changes in liver function by regular review.