T-tube drainage is a common drainage method used for extrahepatic biliary tract exploration procedures. Generally speaking, during biliary tumor or bile duct stone surgery, it is often necessary to perform a longitudinal bile duct incision so as to remove bile duct stones and bile duct malignant tumors, and if the incised bile duct is sutured in one stage, it often causes postoperative bile leakage. At the same time, it drains bile out of the body and reduces the pressure in the bile duct. After 1-2 months postoperatively, the patient’s intra-abdominal wound is completely healed and then the T-tube is removed, which is not prone to bile leakage, and the patient can achieve better treatment results.