Complementary foods are appropriate for exclusively breastfed infants at about 6 months of age. The transition from pureed, single-ingredient complementary foods should be gradual. Postnatal breastfeeding is the most ideal state, conducive to the health of mother and baby. However, as babies continue to grow, it is difficult for breastfeeding to meet the nutritional needs of babies’ growth and development after 6 months of age. Moreover, the baby’s milk teeth begin to erupt at 5-6 months, at this time gradually add complementary food to the baby, is conducive to promoting the baby’s teeth eruption and jaw bone development. Combined with the characteristics of the child’s growth and development and nutritional needs, it is now recommended to start adding complementary foods around 6 months of age, the principle of adding complementary foods is from less to more, from thin to thick, from fine to coarse, from a single to diversified. When adding complementary foods, it is recommended to first add rice flour, rice flour and formula mixed feeding, and then gradually add other foods, such as puree, vegetable puree, millet porridge, etc. Around 8 months of age, you can give the child to eat egg yolks, pureed meat, pureed pork liver and other foods. In the process of adding complementary foods, pay attention to reasonable feeding, do not feed too much at one time, start from a single ingredient, and then add other ingredients after gradually adapting to the baby’s allergy to food found to be contraindicated. If the baby gastrointestinal discomfort and other abnormalities, you need to consult a doctor in a timely manner, so as not to delay the aggravation of the condition.