In general, endoscopic retrograde cholangiopancreatography has certain stimulating and provoking effects on the pancreas and may even induce acute pancreatitis, therefore, the majority of patients with acute pancreatitis do not need cholangiopancreatography. However, for patients with acute pancreatitis combined with acute septic obstructive cholangitis, emergency cholangiopancreatography and sphincterotomy as a non-surgical treatment can safely and effectively urgently reduce bile duct pressure, drainage and remove gallstone obstruction, reduce the occurrence of cholangitis and pancreatic necrosis, greatly reduce the morbidity and mortality rate and complication rate of severe pancreatitis, and is an important treatment for acute biliary pancreatitis. and has achieved more satisfactory results. The National Institutes of Health and the British Society of Gastroenterology recommend that emergency cholangiopancreatography should be performed as soon as possible after the onset of abdominal pain for suspected or diagnosed biliary pancreatitis and. The Guidelines for the diagnosis and treatment of acute pancreatitis in China published by our country also recommend that in units where available, endoscopic nasobiliary drainage should be performed for suspected or confirmed acute biliary pancreatitis if it meets the index of severe disease and/or has cholangitis, jaundice, dilated common bile duct, or if the condition is initially judged to be mild acute pancreatitis but deteriorates during treatment.