If possible, breastfeeding can be done until the baby is 2 years old, and now WHO requires that mothers should try to exclusively breastfeed for at least 6 months. Breast milk contains all the nutrients needed by the baby, and it is well-matched and has a high absorption rate. If the mother is in good health, she can breastfeed until the baby is 2 years old. The WHO requires that mothers should breastfeed for at least 6 months, and then breastfeed until 2 years of age or longer if possible, especially colostrum, which is rich in immunologically active substances, and it is best for newborns to receive colostrum for the first week. After 6 months, breast milk is difficult to meet the nutritional needs of infants, to meet the needs of growth and development, pay attention to the addition of complementary foods to supplement nutrition.