Bilirubin can be normalized after drainage of biliary tract obstruction after a period of time, but drainage can only be used as a palliative treatment, and it is necessary to solve the primary disease causing biliary tract obstruction as soon as possible in order to normalize bilirubin more quickly and not to recur. Drainage of bile duct obstruction can effectively discharge the stagnant bile, so that the bilirubin will gradually return to normal, reduce the pressure of the bile duct, the amount of bile backflow into the blood will be greatly reduced, resulting in jaundice will be improved, which is conducive to the improvement of liver function, and can also avoid secondary infections caused by stagnant bile. Biliary drainage requires strict monitoring of the amount and color of the drainage fluid, and regular dressing changes of the drainage wound to avoid infection. Drainage of bile duct obstruction is a palliative treatment, and it is necessary to actively cooperate with doctors to standardize the treatment of the primary disease to avoid deterioration of the situation.