Amylase and lipase are important indicators used in clinical investigation of pancreatitis. One of the biochemical indicators for the clinical diagnosis of acute pancreatitis is the increase of blood amylase and blood lipase, which is more than 3 times of the normal value. Therefore, for patients with abdominal pain, blood amylase and lipase will be checked routinely. If these two indicators are more than three times the normal value, and the patient is accompanied by obvious abdominal pain or even nausea, vomiting, and the patient is instructed to do a CT and found that abdominal CT suggests that there is pancreatic exudate, pancreatic enlargement, or even necrosis, etc., they are important indicators used to confirm the diagnosis of whether it is an acute pancreatitis. After treatment of pancreatitis, blood amylase and lipase will gradually decrease, which is also one of the most important life guidance for clinical judgment of whether to be able to eat or not.