Objective:To study the etiology ,diagnosis and treatment of functional delayed gastric emptying(FDGE) resulting from pancreatoduodenectomy. Methods:From June, 1990~June, 2003, 136 patients received pancreatoduodenectomy, whose clinical data were retrospectively analyzed. Upper gastrointestinal radiography and endoscopy were the main methods of examination. Results:Twentyeight cases were complicated with FDGE in the 136 patients(20.6%) after operation. The occurrence of FDGE was correlated with hyperbilirubinemia, diabetes, duodenal obstruction, pancreatic fistula and abdominal infection. All patients were cured with conservative treatment. The recovery time of gastric motility was 1442 days, average time was 28 days. Conclusions:Hyperbilirubinemia, diabetes, duodenal obstruction, pancreatic fistula and abdominal infection were the main causes of FDGE.