Children with biliary atresia have better results with surgery within 60 days of birth, and the longer the time, the worse the results, but it is precisely within 60 days that it is extremely difficult to identify with other diseases. Therefore, early diagnosis of biliary atresia is very important. There are many methods to identify delayed jaundice in newborns and infants, and the confirmation rate is mostly in the range of 40% to 87%. Cholangiography is considered to be the most ideal method for definitive diagnosis at present. This method is simple, safe, less invasive, and has a 100% confirmation rate.