ERCP is a minimally invasive examination method, almost all biliary tract injuries can be clearly diagnosed, and most of them can be treated endoscopically, avoiding the need for secondary abdominal surgery. ERCP is a minimally invasive method, and almost all biliary tract injuries can be clearly diagnosed, and most of them can be treated endoscopically, avoiding abdominal surgery. Common causes of biliary tract injury: 1, anatomical variation of extrahepatic bile ducts; 2, adhesions due to recurrent chronic inflammation; 3, excessive intraoperative stretching; 4, bile duct burns; 5, misclamped bile ducts; 6, preoperative bile duct stones missed, postoperative bile duct stones embedded obtuse to the bile duct pressure rise caused by the ligature wire or titanium clip off the stump of the bile duct. The above-mentioned causes of bile duct injury are difficult to avoid completely during surgery. Early diagnosis and treatment of biliary tract injury is very important. In imaging examination, ERCP (EncoscopicRetrogradeCholangio-Pancreatography, endoscopic retrograde cholangiopancreatography) can not only accurately display the anatomical structure of the biliary tree, but also take corresponding treatment measures immediately, such as possible should be used as the first choice of examination means. With the development of the multidisciplinary combined treatment model in recent years, researchers have suggested that endoscopic treatment should be preferred in patients with bile duct injury as long as biliary-digestive continuity exists. Even if the endoscopic treatment fails, it does not affect the efficacy of subsequent surgical treatment. In contrast, if surgical repair is hastily chosen, the alteration of the GI structure (Roux-en-y biliary-intestinal anastomosis) will result in the patient having no further opportunity for endoscopic treatment. Endoscopic (ERCP) treatment is performed by nasobiliary drainage, implantation of a biliary stent, and columnar balloon dilation depending on the specific biliary tract injury. ERCP is mainly used to treat biliary origin injury by the mechanism of reducing biliary pressure, shunting bile at the biliary fistula, closing the fistula, dilating the biliary stricture, and keeping the biliary drainage open. Therefore, the application of ERCP in post-biliary complications is both minimally invasive and effective, avoiding reoperation on the patient’s abdomen, reducing medical costs and shortening hospitalization days, and is worth promoting in clinical practice.