Abstract: Biliary atresia(BA)is a common cause of obstructive jaundice in infancy. Surgical treat-ment for infant patients has good result within 40 to 60 days. But the disease can hardly be cured after 90 days when it turns out to be liver cirrhosis or liver failure. So it is important to make the early and differential diagnosis as soon as possible. Main imaging methods of BA include ultrasonography, hepatobiliary dynamic imaging, magnetic resonance cholangiopancreatography and cholangiography. Each method has its own advantage and shortage. This article summarizes the present situation and progress of the imaging method in the diagnosis of BA.