ERCP is an endoscopic technique that was started in the United States in the 1960s and later introduced to China. This technology has brought good news to many patients, and many elderly patients have been saved because of ERCP technology.The application of ERCP technology mainly includes the following aspects: 1. ERCP technology mainly treats severe cholangitis, especially at New Year’s Eve, because many rural elderly people, who are left behind, and their children work abroad for a long time, may have diseases on their bodies, pain, they endure, and at the end of the New Year When the weather is cold and they eat well, they often have episodes of common bile duct stones or severe jaundice; at this time, elderly patients with high blood pressure and heart disease can not be dealt with, and even anesthesia can not be played, so they can do bile duct drainage by ERCP technology to save the patient’s life; 2, ERCP technology can diagnose and treat bile duct stones, bile duct tumors, and pancreatic duct stones ERCP technology can measure the pressure of the sphincter of Oddi; 4. ERCP technology can keep the nasobiliary duct or nasopancreatic duct and take the patient’s bile or pancreatic fluid for culture to check the tumor cells; 5. ERCP technology can brush the exfoliated cells for biopsy or disease examination.