Objective To investigate the value of therapeutic endoscopic retrograde cholangiopancreatography (ERCP) in the patients with pancreaticobiliary diseases and the methods to manage complications. Methods 100 cases treated with ERCP were analyzed retrospectively. Compared with hepatobiliary diseases were examined with ERCP,abdominal B-ultrasound and CT simultaneously. Results 100 cases underwent ERCP,the success and failure were 95 cases and 5 cases respectively;64 cases with simple diagnostic in ERCP,36 cases in EST;EST was performed on 36 patients with hepatobiliary stones. Stones were removed from 14 patients with single common bile duct stones and 19 patients with multiple duct stones;The diagnostic rate of ERCP、abdominal B ultrasound、CT were 96.0%、39. 0% and 64.0% respectively. The rate of diagnosis in ERCP were higher than the B ultrasound and CT(x2 =7. 05 ,P ＜ 0. 01 ,x2 = 3.83, P ＜ 0. 05); The complication of gastro-intestinal tract bleeds in 2 cases (2.0%)、 acute cholangitis in 1 case (1.0%) 、acute pancreatitis in 2 cases(2.0)%, pass through the internal medicine to treat conservatively completely recovers from an illness after treatment. Conclusion Therapeutic ERCP was effective and minimally invasive treatment for pancreaticobiliary diseases.