Objective To identify the differential diagnosis value of CT in the pancreatic cystic disease.Methods 77 cases of pancreatic cystic disease diagnosed by CT scan were retrospectively analysed.Results CT recognized the different imaging features about cystic disease of malignant pancreatic tumor,metastatic cystic disease,begin-malignant pancreatic cystadenoma and acute/chronic pancreatitis.Conclusion Mastering the CT features of pancreatic cystic disease may give rise to the differential diagnosis,which is useful to the clinical decision.