How long it takes for a bile duct drain to be removed is determined on a case-by-case basis. Generally, it can be removed in 3-5 days, some may take 1-3 months, and some even need to be placed for life. So each case is extremely different, mainly including the following: 1. Routine drainage tube: The abdominal drainage tube is routinely placed after biliary tract stone surgery to observe the blood leakage within the abdominal surgery and the presence of biliary fistula. Generally, within 3-5 days after surgery, if the drainage fluid is relatively clear, about 10 ml, it can be removed; 2. T-tube: If a T-tube is placed during surgery, if there are no special circumstances, it is usually removed in about 1 month. The main function is to drain the bile and reduce the probability of biliary fistula. If residual stones are found in the bile duct after surgery, they can be removed again through the T-tube sinus tract to avoid the risk of reoperation. 1 month or so, fixed adhesions will be formed around the T-tube sinus tract and the sinus tract will be firm. At this time, there is no problem and the T-tube can be removed. 3. PTCD: Percutaneous percutaneous hepatic choledochotomy (PTCD) drains are often used in patients with severe preoperative bile obstruction and markedly elevated jaundice who are temporarily unable to undergo surgical treatment, so that the bile can be drained by PTCD first and the need for second-stage surgery can be decided after the jaundice subsides. In this case, the timing of the PTCD drainage tube placement depends on the timing of the second surgery. In some acute infections, the bile is infected after the PTCD is placed, and the infection is controlled for 1-3 months, and a second surgery is performed to remove the corresponding infected lesions. If for some tumorigenic factors, it is necessary to wait for the jaundice to subside to normal and consider surgical treatment to reduce the risk in radical cancer surgery. In addition, bile drainage is performed for certain intermediate and advanced cancers, which cannot be treated surgically and can only be treated by placing a bile drain for a long time to drain the bile and avoid a significant reduction in survival time due to deep jaundice. Therefore, the duration of bile duct drainage placement varies for each individual, depending on the condition.