Colostrum contains many types of immune proteins, with the highest content of secretory IgA immunoglobulins. Secretory IgA immunoglobulin enters the baby’s body through breastfeeding and is mainly distributed in the baby’s digestive, respiratory and urinary tract mucosa, which can protect the baby from external disease-causing microorganisms to a certain extent, enhance the baby’s resistance and reduce the occurrence of diseases. Breast milk is easy to digest, easy to absorb, moderate temperature, rich in nutrients, breastfeeding is conducive to the healthy growth of the baby. It is recommended that mothers insist on breastfeeding after giving birth.