Preoperative intestinal preparation is required for children with BA to reduce intestinal biota and reduce the chance of postoperative cholangitis. Preoperatively, 1-2 bowel washes should be performed in 1 d. Generally, saline low-pressure reflux bowel washes should be used, and soap and water should not be used to avoid the alkaline environment of the intestine to increase the absorption of ammonia and thus increase the burden on the liver. The total amount of lavage fluid is 80-120 ml/kg, and particular attention should be paid to keeping the child warm during lavage to avoid delaying the operation due to respiratory tract infection caused by cold. Preoperative clean bowel wash can be used to reduce intestinal microorganisms quantitatively by mechanical flushing. The postoperative incision care for children with BA has preoperative liver insufficiency, cirrhosis, and even abdominal distention due to ascites. Postoperative incision healing is poorer than other children, and there is often extravasation of ascites through the surgical incision, so it is necessary to change the dressing in time, keep the incision dry, and prevent wound infection and dehiscence. 3, close observation of changes in the condition. Observation includes temperature, pulse, respiration, mental status, changes in jaundice, abdominal distension and growth. Since most children with BA are combined with umbilical hernia, sometimes whether the contents of the umbilical hernia protrude is used as an objective indicator to observe the degree of abdominal distension. Severe abdominal distension can be considered as a sign of increased liver insufficiency. Attention should be paid to differentiate it from postoperative intestinal obstruction. In addition, postoperative observation of changes in jaundice is an important part of disease observation. When the intrahepatic bile ducts are opened after surgery, bile drains out of the bile ducts into the intestine, indicating that bile enters the normal hepatic-intestinal circulation, at which time the child shows a reduction in jaundice. The skin and urine become lighter in color, and the color of stool changes from vitriol to green or yellow, which are all signs of improvement. 4.Basic care. To keep the mouth clean, a small amount of warm water needs to be fed after feeding to remove residual milk, and those with thrush use saline to clean the mouth after feeding. Use warm water for skin cleaning and avoid using soap products to avoid damaging the protective layer of the skin. Postoperative complications can be combined with a variety of complications in children with BA, the most common of which are biliary ductitis and secondary infection in the early stage. (1) Cholangitis is the most common and difficult complication after hepatic hilar-jejunostomy, which seriously affects the prognosis. It has an incidence of 80%, and it can cause rapid occlusion of the newly established small bile ducts that drain bile because of inflammatory reactions and scarring, thus requiring early management and prevention. Its manifestations include unexplained irritability, crying, fatigue, abdominal distension, and deepening of xanthogranuloma. Bile drainage is reduced or stopped, with chills and fever in severe cases, re-elevated serum bilirubin, and markedly elevated blood leukocytes. A combination of more than two antibiotics is required after the onset of cholangitis. The application of hormones can reduce tissue edema, inhibit collagen deposition, accelerate the discharge of intrahepatic stagnant bile, and facilitate the regression of xanthogranuloma. Improve the quality of survival of the postoperative child. Increase the number of years of autologous liver survival. However, it also leads to a decrease in the child’s resistance, so care should be strictly limited to visitors. Do not share the same room with children with infectious, especially respiratory, infections. Take care to enforce protective isolation. Food reflux is now recognized as an important cause of cholangitis, therefore, children should be held upright for more than 30 min after feeding to reduce food reflux. (2) Factors associated with secondary infection include decreased resistance, massive long-term use of antibiotics, and hormone therapy, etc. Children with biliary atresia possess many predisposing factors. They manifest as superficial or deep fungal infections, such as cutaneous perineal Candida infections, thrush, and fungal cholangitis, which is difficult to diagnose and treat. Biliary atresia care is important to provide the necessary conditions for preoperative preparation and postoperative recovery, so parents should pay attention to the care of their children to avoid complications.