Abstract:Objective:To study the causes of reoperation after biliary duct operation, in order to decreasing the rate of biliary tract reoperation. Methods:The clinical data of 828 patients who underwent reoperation of biliary duct diseases in Nankai hospital between 1990－1999 were evalated, and the causes of biliary duct reoperation were classified and analysed.Results:The most common cause for reoperation was recurrent or retained bile stone(65.10% ), bile stone companied by stenosis of the sphincter of oddi (33.82%), simple stenosis of sphincter of Oddi ( 9.54%), traumatic stricture of bile duct and stricture of bilioenteric anastomosis( 10.39%), bile duct obstruction due to tumor (6.52%), and other less important factors. Conclusions:Recurrent or retained bile duct stone was the main cause for biliary reoperation,and stenosis of the sphincter of Oddi was the next important factor for reoperations.Thoroughness of the initial operation and rationality of operative procedure are the chief factors to decrease bile duct reoperations.