Abstract: The treatment of iatrogenic bile duct injury is complex, especially for delayed iatrogenic bile duct injury, and the timing and treatment measures are crucial. Endoscopic surgery treatment, interventional treatment and surgery all play important roles. Endoscopic surgery treatment has become the main choice for iatrogenic bile duct injury because of its advantages of small trauma, fast recovery, short operation time and precise efficacy, etc. At the same time, endoscopic surgery treatment can create opportunities and conditions for secondary bile duct repair surgery, and can also control the occurrence of post‑repair complications. With the further populari-zation and application of endoscopic technology, the development of imaging three-dimensional reconstruction technology and visualization analysis, endoscopic surgery treatment will definitely become the main treatment for delayed iatrogenic bile duct injury.