Pediatric congenital choledochal cyst (congenital biliary dilatation) is clinically common and is one of the larger surgeries in pediatric abdominal surgery. Due to the deep operating site and many surgical operations, it often requires a large incision for visualization, with large injuries, bleeding, and intraoperative transfusion, and more complications. Laparoscopic choledochal cyst resection, common hepatic duct, jejunum Roux-en-Y anastomosis greatly reduces the trauma, bleeding and complications, and improves the clinical efficacy. The 3-hole method or 4-hole method is often used, in which the gallbladder is first freed and resected with an electrocoagulation hook, the choledochal cyst is transected and resected, the distal end is ligated, and the proximal common hepatic duct is retained in the form of a flared hole, ready to be anastomosed with the jejunum; the jejunum is dragged from the umbilicus and the ligament of the curvature is transected at a distance of 15 cm from the jejunum and the distal end is closed, and the jejunum is anastomosed end to end at a distance of 15 cm from the umbilical hole; and the jejunum is raised from the post-colonic area, and anastomosed end to end with the common hepatic duct, so as to reconstruct the bile duct. Li Aiwu, Department of Pediatric Surgery, Qilu Hospital, Shandong University, China Laparoscopic choledochal cyst excision, common hepatic duct and jejunum Roux-en-Y anastomosis is one of the more difficult operations in pediatric laparoscopic technology. The risk is to accidentally injure the portal vein and hepatic artery when freeing the cyst, which are fatal injuries, but due to the magnifying effect of laparoscopy, as long as the operation is fine and the blood vessels are clearly revealed, it is rather less likely to be injured than open surgery. Another difficulty is the hepatic-intestinal anastomosis, which is difficult due to the deep operation site and small space, and requires precise anastomosis techniques. Compared with open surgery, laparoscopic surgery is not only minimally invasive and beautiful, but also has the advantage of facilitating the detection of the accompanying hepatic stenosis, which requires incision of the stenotic segment, molding of the hepatic ducts, and then hepatic-intestinal anastomosis, which is not easy to be detected due to the depth of the site in the open surgery and the difficulty of the operation. Several cases have been performed in our pediatric surgery department since 2008, including one case of perforated choledochal cyst, which was successfully completed.