ERCP surgery is a very important tool for treating biliary and pancreatic diseases, which is minimally invasive and very simple. ERCP surgery is completely different from biliary and pancreatic diseases, where postoperative fasting may be longer if surgical procedures are performed, and often the surgeon will wait until, for example, the anus is exhausted, i.e., after farting, before eating. ERCP has very little impact on the normal physiological function of the gastrointestinal tract, generally speaking, the purpose of fasting for 24 hours after ERCP is to prevent the occurrence of postoperative pancreatitis. 3 hours after ERCP and 24 hours after ERCP, the amylase will be checked, and if it is normal, the patient can eat immediately without waiting for the appearance of intestinal gas. The recovery is quick, the patient eats early, and the patient is discharged from the hospital very quickly, usually 2-3 days after ERCP.