Biliary-intestinal anastomosis is still a relatively large procedure in abdominal surgery or hepatobiliary surgery. Biliary-enteric anastomosis is often combined with other surgeries. In some cases, biliary-enteric anastomosis is required for primary intrahepatic bile duct stones, such as hemihepatectomy, and in order to maintain the patency of the bile ducts, portal bile duct formation is performed, and biliary-enteric anastomosis is required to connect the portal bile ducts to the intestine. Biliary regurgitation often occurs due to the loss of the function of the lower Oddi sphincter of the bile duct, and bile-intestinal anastomosis is needed to reduce biliary regurgitation, including pancreatic head cancer surgery. After pancreaticoduodenectomy, the bile duct has to be accessed and bile-intestinal anastomosis is needed. In radical bile duct cancer surgery, after the tumor of bile duct is removed, the remaining normal residual bile ducts need to be intestinally anastomosed to keep the bile outflow tract unobstructed. For example, if a bile-intestinal anastomosis has been performed and the bile-intestinal anastomosis is narrowed after a long time, the original narrowed area will be cut off and the bile-intestinal anastomosis will be redone, so sometimes it is commonly called revision surgery.