Biliary obstruction stent effect and extracorporeal drainage does not exist which is better, should be selected according to the severity and development of the disease. 1. If the biliary obstruction is not serious and the scope of the obstruction is relatively small, extracorporeal drainage is usually recommended, which can control the pressure in the bile ducts, prevent bile reflux and cholestasis caused by the increased pressure, and also help to alleviate some of the complications. 2. For more serious bile duct obstruction, and the scope of obstruction is relatively large, and the drainage effect is not good, it is generally recommended to take the stent implantation, which can play a supportive role, assist in decompression and drainage, reduce jaundice, and prevent the re-formation of obstruction. 3. In addition, for preoperative jaundice reduction, extracorporeal drainage is usually adopted for economic reasons; for biliary obstruction caused by malignant tumors, biliary stent implantation is recommended if palliative jaundice reduction cannot be achieved by surgery. If biliary obstruction occurs, it is recommended to go to the hospital for examination first, and the doctor will choose the best treatment according to the severity and progress of the patient’s condition.