Acute pancreatitis is one of the more common diseases in the world. Mild acute pancreatitis is often self-limiting and has a good prognosis, while a small number of patients may develop serious complications and progress to severe acute pancreatitis, with a mortality rate of 5%. There are many causes of acute pancreatitis, and in China, biliary tract diseases, especially cholelithiasis, are the most common cause of pancreatitis, called biliary pancreatitis, and some studies have shown that stones may compress the tissue between the distal bile duct and pancreatic duct and cause obstruction of the pancreatic duct, or cause obstruction of the common channel so that bile flows back into the pancreatic duct causing pancreatitis. Therefore, it has been suggested that early sphincterotomy (est) via ercp and removal of obstructing stones can help improve the course of pancreatitis. The role of ERCP in acute biliary pancreatitis and the timing of its implementation have been controversial, and the latest guidelines for the diagnosis and treatment of acute pancreatitis state that the indications for ERCP should be strictly controlled: for patients with acute fever within 24 to 48 hours with signs or symptoms of cholangitis (such as chills, abdominal pain, jaundice, sepsis), rapid changes in condition (worsening pain, deepening jaundice, decreasing white blood cells, vital Patients with signs or symptoms of cholangitis (e.g. chills, abdominal pain, jaundice, sepsis), rapid changes in condition (worsening pain, jaundice, decreasing white blood cells, changes in vital signs), and imaging (abdominal ultrasound, CT) suggesting the presence of common bile duct stones should undergo emergency ERCP as soon as possible.