Choledochal cyst is a common congenital biliary developmental abnormality, and its most serious complications are the combination of bile duct carcinoma, recurrent choledochal stones, and cholangitis, so it should be treated surgically as soon as it is detected. Cystectomy and bile duct jejunum Roux-en-Y anastomosis are the standard treatment. Currently, laparoscopic cholecystectomy is the procedure of choice for cholecystectomy in gallbladder diseases, and more and more surgical diseases can be treated by laparoscopic techniques. Laparoscopic surgery for choledochal cysts has also been gradually developed in many hospitals. Advantages of laparoscopic choledochal cystectomy: 1. The lens of the laparoscope can be rotated in the body, and the vision of the abdominal cavity is comprehensive; 2. The magnifying function of the laparoscope enlarges the tissues to 4~8 times, which can show the vascular structure around the cyst more clearly, facilitate intraoperative operation, reduce bleeding, and avoid damaging the surrounding tissues and structures, etc.; 3. The operation is less traumatic, with less pain, quicker recovery, and shorter hospitalization time; 4. Small interference with other organs in the abdominal cavity, further reducing the trauma to the patient and the chance of complications such as postoperative intestinal adhesion and obstruction.