Objective To investigate the CT and MRI imaging features of pancreatic cystic neoplasms. Methods All imaging date of 44 patients (pancreatic cystic neoplasms) confirmed by surgery and pathology were retrospective analyzed. Results ①Mucinous cystic neoplasms(MCN) 17 cases, 11 cases located in the body and tail of pancreatic, manifested clear boundaries, capsule visible wall nodules and partitions.MCN usually large volume, mean diameter 73.0mm.There are 6 cases of MCN were malignant. ②Serous cystic neoplasms(SCN) 11 cases.SCN were usualIy lobular with many smaIl cysts. Microcystadenomas in 8 cases, of which 5 cases showed radiating fibrous septation. 2 cases of Oligocystic cystadenomas, solid serous cystadenoma in 1 case. ③Intmductal papillary mucinous neoplasm(IPMN)8 cases, have 6 males and 2 females with an average age of 55 years, 3 of them were main-duct type and 5 of them were branch -type.All lesions were communicated with the pancreatic duct, and different degrees of pancreatic duct dilatation occurred in 7 cases. ④Solid pseudopapillary neoplasms(SPN) 8 cases, the average age of 29 years old,are all women and all cystic solid lesions and 5 of them bleeding. Conclusion This paper analyzes the CT and MRI features of pancreatic cystic tumors and their differential diagnosis, which was helpful to the preoperative diagnosis of pancreatic cystic tumors.