Objective:The aim of this study was to determine the bacterial spectrum of abdominal infection after pancreatic resections and the relationships between pancreatic fistulae and abdominal infections. Methods:Intraperitoneal drainage fluid was collected through sampling tubes and bacteriological examinations were performed.The clinical characters of patients and the duration of intraperitoneal drainage were recorded. Results:For 60 patients, positive cultures of drainage fluid were 2.7%（1/37）、 27.27%（15/55）、 45.76%（27/59）、 70.27%（26/37） and 87.5%（14/16）in POD0,POD1,POD3,POD7 and POD14.Sixty-seven stems of bacteria were identified.The most dominant bacteria were MRSCoN 16.4％（11/67），E. faecalis 14.9％（10/67） and MRSA11.9％（8/67）.Abdominal infections were found in 17 cases during 10 days after operations, and 22 patients suffered from pancreatic fistulae with intraperitoneal drainage more than 14 days.χ2 statistics and Binary Logistic Regression shows that intraperitoneal infections during 10 days after operations was potential risk factors for pancreatic fistulae, while positive culture of drainage fluid in P1D and P3D were not related with pancreatic fistulae. Conclusion:The incidence of positive culture of drainage fluids increased with the duration of postoperative abdominal drainage.Pancreatic fistulae were not related with abdominal drainage fluid cultures,but with clinical abdominal infections.