The clinical experience of Professor YAN Huimin in the treatment of infantile cholestasis liver disease (fetal jaundice) was summarized. It is believed that the disease is caused by dampness pathogen, which is the main cause of fetal jaundice. Dampness pathogen can block the ,qi, movement in both ,yin, jaundice and ,yang, jaundice, resulting in unsmooth blood circulation and blocked blood stasis. The disease is caused by bile overflowing out of bile duct to the skin, but dysfunction of spleen in transportation, dysfunction of stomach in harmonizing and descending, and internal generation of dampness pathogen are the root causes. In clinical practice, the four diagnostic techniques should be combined, and ,yin, and ,yang, syndrome should be differentiated firstly. The color of the stool and the thickness of the tongue coating are the main basis for syndrome differentiation. Treatment is often to remove dampness, and take into account the cold and heat, and the method of promoting blood circulation to remove blood stasis is going throughout the treatment; at the same time, the method of dispersing stagnated liver ,qi, for promoting bile flow is strengthened to cure the disease and solve the root causes. In the course of treatment, it is necessary not to forget to concern and protect the healthy ,qi, prevent medicinal pathogen from damaging the healthy ,qi,. Meanwhile, from the first small beginnings one can see how things will develop. We should not only prevent disease, but also promote the recovery of the disease, so as to prevent diseases from exacerbating, and promote the recovery of diseases.