AIM:To evaluate the curative effect of the removal of fistula on congenital fistula of lacrimal sac in candidates of flying cadet.METHODS:During pilot selection from March 2005 to March 2008 in our region,5 cases 7 eyes of congenital fistula of lacrimal sac undergoing removal of fistula and 6 cases 6 eyes undergoing fistula excision were analyzed retrospectively.RESULTS:A total of 11 cases were successfully operated.There was no recurrence after 16±5.6 months follow-up.But 3 cases were eliminated in the re-examination due to the larger postoperative scar left by the fistula excision.CONCLUSION:Removal of fistula is an effective method in patients of the flying cadet with congenital fistula of lacrimal sac.It can make the cadet meet the standards and be selectively retained.It confirms to the thought "Weight function,light form" of the pilot selection of Air Force.