Breast milk has five major nutrients and three major immune functions. In addition to being rich in nutrients, it also contains a variety of substances that resist bacterial, viral and fungal infections, which are important for preventing infections in newborns and infants, but it has no anti-yellowness function. Early prevention of breast milk jaundice, one is to increase the number of feedings for newborns 3-4 days after birth, but the amount should not be too much each time. Sucking stimulates intestinal motility and reduces bilirubin reabsorption. If the amount of breast milk is insufficient then supplemental formula or other milk substitutes should be given appropriately to save the baby from starvation and prevent bile stasis. If the jaundice is severe and pathological, the baby should receive blue light and other anti-yellowing treatments.