The advantages and disadvantages of endobiliary drainage are that it can effectively carry out endobiliary bile drainage, and the disadvantages are that there is a certain complication rate. 1. Pros: biliary intestinal drainage is effective and has good efficacy for bile drainage disorders caused by various reasons. Choledochoduodenal anastomosis and choledocho-jejunal Roux-en-y anastomosis are the two most commonly used procedures. 2. Disadvantages: biliary and intestinal drainage may have complications, biliary and intestinal anastomosis is the key to affect the complication rate, according to the situation of reasonable choice of surgical style and optimization of surgical operation can effectively reduce the complication rate. Biliary and intestinal drainage is a common surgical procedure for the treatment of biliary and gastrointestinal disorders, and with the continuous improvement of surgical procedures, the efficacy of biliary and intestinal drainage has been continuously improved, and the complication rate has been continuously reduced. Biliary intestinal drainage should be performed in a regular hospital, where a specialized doctor will diagnose and determine the surgical plan and perform the surgery in order to achieve the best therapeutic results.