Objective:To evaluate the effects of laparoscopic choledochal cyst excision for treatment  of congenital choledochal cyst.
Methods:Forty patients with congenital choledochal cyst were randomly divided into control group and observation group: the control group underwent open abdominal excision of choledochal cyst, while the observation group had laparoscopic resection of choledochal cyst.
Results:The operations of all the 40 cases in the 2 groups were successfully completed.The operative time was longer in the observation group (P＜0.01), but the amount of blood loss,  time to passage of flatus and time for oral intake after operation, postoperative hospitalization time, and the size of incision in the observation group were significantly better than the control group(P＜0.001). The all cases of two groups during treatment and follow-up had no serious complications directly related to surgery.
Conclusions:Laparoscopic choledochal cyst excision is effective and safe in treatment of patients with congenital choledochal cyst，although the operative time is longer, and the cost is higher than the open operation.