Objective:To compare the therapeutic effects of modified  loop choledochojejunostomy and  the Roux-en-Y choledochojejunostomy.
Methods:Clinical data of 39 cases of modified loop choledochojejunostomy (ML) and 45 cases of Roux-en-Y choledochojejunostomy (R-Y) were analysed and compared, The patients of the 2 groups were followed-up for 1 to 2 years. The operation time, time to recovery of bowel function,  serum level of total bilirubin and the morbidity  of cholangitis between the 2 groups were compared.
Results:The postoperative serum level of total bilirubin decreased to the same level in both groups (P>0.05). Im ML grpup and R-Y group, the operation time were （53±11.2）min and (72.4±9.5)min, the time to recovery of bowel flatus （79.2±4.4）h and（93±6.5）h， and the morbidity  of cholangitis were 5.1% and 13.3%, srespectiveely. The observed indexes in the ML group were statistically better than those  in the R-Y group (P＜0.05).
Conclusions:The short-term and long-term therapeutic effects of modified loop choledochojejunostomy are good; the modified operation can be the method of choice for choledochojejunostomy.