Abstract: Objective To conclude the MRCP appearance of obstructive jaundice so that to improve the diagnosis of obstructive jaundice.Methods MRCP appearance of Obstructive Jaundice in 47 patients proved by surgery and pathology were analyzed retrospectively.Results Malignant obstructive jaundice (n=25) were as follows: hilar cholangiocarcinoma (n=6) , gallbladder carcinoma (n=2) common bile duct adenocarcinoma (n=4) pancreatic head carcinoma, duodenal adenocarcinoma 9 (n=3) respectively, pancreatic head metastasis (n=7) .Benign obstructive jaundice (n=22) were as follow: inflammatory obstruction (n=3) , gallstone or common bile duct stone associated with inflammation (n=13) , operational scar, common bile duct cyst, duodenal polyp (n=2) respectively.The topic MRCP appearance of malignant obstructive jaundice: the vine-sign for intrahepatic bile, abrupt interruption suddenly and the irregular edge for bile duct appear the prejudicial or centripetal site or filling-defect.The topic MRCP appearance of benign obstructive jaundice: the deadwood-sign for intrahepatic bile, tapering of the dilated bile duct or the regular filling-defect, a sharp and straight tip or the cup-mouse-sign orthe taper-sign.Conclusion MRCP was a effective way of diagnosis of benign and malignant obstructive jaundice.