For the values measured by blood and urine amylase in patients with acute pancreatitis, the normal reference range for blood amylase is between 0-100 U/L and for urine amylase between 100-400 U/L, depending on the laboratory. During an attack of acute pancreatitis, there will be a significant increase in blood amylase early on, usually about 5-10 times the normal reference range, and the rate of increase in urinary amylase may be relatively slow and may reach a peak in 24 hours. Therefore, when reviewing blood and urine amylase values in patients with acute pancreatitis, it is important to take into account the patient’s medical history as well as changes in the condition to specifically determine the specifics of blood and urine amylase. For some patients with acute pancreatitis, in addition to blood and urine amylase values, blood biochemical indexes such as lipase should also be referred to evaluate the changes in the condition of patients with acute pancreatitis together.