The diagnosis of pancreatitis is determined based on the clinical manifestations of the patient, combined with instrumental imaging. First, according to the clinical manifestations of the patient, whether there is persistent epigastric pain with nausea, vomiting, and back radiating pain. Second, combined with blood system examination, if the onset is early, blood amylase is a more sensitive indicator within 24 hours, and the increase is especially obvious, it can be diagnosed as acute pancreatitis. Third, combined with imaging examinations, especially CT of the upper abdomen, to check whether there is exudation around the pancreas, even if the blood amylase is not high, if there is exudation around the pancreas, it can be diagnosed as acute pancreatitis. Fourth, if the time exceeds one week, the urine amylase will be significantly higher when checked, which is also a criterion for the diagnosis of pancreatitis.