Biliary drainage can be done by percutaneous puncture, endoscopy, laparoscopy or open surgery, mainly to open the bile ducts and drain bile to improve the symptoms of obstructive jaundice, etc. The cause of biliary obstruction should be clarified, liver function should be comprehensively evaluated, and the surgical procedure should be reasonably selected before the operation. 1. Percutaneous hepatic puncture for biliary drainage, preoperative imaging assessment should be done well, the whole process of monitoring the route of needle insertion under the guidance of color ultrasound, and implantation of guidewire and specific adaptable type of drain after puncturing into the bile duct to extract the bile. 2. Transendoscopic biliary drainage is performed by inserting an endoscope through the digestive tract into the descending part of the duodenum, locating the opening of the bile ducts and pancreatic ducts at the duodenal papilla, and placing a nasobiliary tube or biliary stent into the bile ducts to carry out biliary drainage. 3. Laparoscopic or open surgery, after anesthesia to establish a pneumoperitoneum or open abdomen under direct vision, generally need to break the hepatic round ligament and sickle ligament, reveal the bile ducts, incision and exploration or dilatation, placement of T-tube, suture. Complications of biliary drainage include biliary fistula, biliary infection, and biliary bleeding, etc. If the condition necessitates it, standardized care and risk reduction should be sought.