Currently, experts believe that the best age for surgery for congenital biliary atresia is before the second month of life. Because there is no accurate diagnosis of biliary atresia after birth, but also treatment and observation. Biliary atresia children within 2 months of birth liver lesions suspicious, after surgery if the bile discharge smooth, cholestatic liver hardness can be reversed. If the time is longer, the child’s liver develops biliary cirrhosis, and even after surgery the cirrhosis is difficult to recover. Therefore, even if the jaundice subsides after surgery, the liver function will get worse and worse, which will seriously affect the quality of life and health of the child. It will be more difficult to operate when the child is more than 2 months old, and the number of people who need liver transplantation after surgery will also increase.