Sequelae of congenital bile duct dilatation surgery, at present, the more common clinical sequelae are adhesive intestinal obstruction and retrograde biliary tract infection after surgery. The most common congenital biliary dilatation in China is type 1, which mainly occurs when the common bile duct is dilated in a shuttle shape. Generally, for type 1 congenital choledochal cysts, the current clinical surgical treatment mainly consists of resection of the choledochal cysts, closure of the distal end, and then Roux-en-Y anastomosis of the common hepatic duct to the jejunum, which is a relatively large surgical trauma, and so the common sequelae after the surgery mainly include two kinds of sequelae. The most common sequelae after the surgery include abdominal pain and distension due to abdominal adhesion, even nausea, vomiting, and stopping anal defecation and gas evacuation. In addition, after the biliary anastomosis, it loses the function of controlling the backflow of intestinal fluid into the bile ducts, which may cause biliary tract infection due to the backflow of intestinal fluid into the bile ducts, which may be manifested as abdominal pain, fever and even jaundice.