Infants are not recommended to drink pure milk, try to breast milk or infant formula-based, to avoid indigestion and food protein allergies and other phenomena. Infant gastrointestinal function development is not perfect, pure milk protein content is too high, after drinking may appear food protein allergy, constipation, diarrhea, blood stools, bloating and other manifestations, so it is recommended that infants under one year old do not drink pure milk, should be based on formula milk or breast milk. Babies in infancy should be breastfed or formula-fed, and after 6 months, if the general condition is good, complementary foods can be added. Complementary food should start with iron-fortified rice powder, and then gradually add pureed fruit, meat and vegetables. Regular visits to the child health department are recommended, and dietary adjustments should be made according to the doctor’s advice.