Babies are generally considered to add complementary foods at 4~6 months of age, which need to be added gradually and little by little. After the baby is born, the digestive function is gradually perfected generally at 4~6 months after birth, at this time the baby digestion and absorption function has a certain development, at this time it is more suitable to add complementary food. Add complementary foods, the need to let the baby’s body to adapt to the process, little by little, the first to add the complementary food should be rice paste, and then a little bit of egg yolks, vegetable puree and other foods. The principle of adding complementary foods for babies is from less to more, from thin to thick, from one to many. If, when adding complementary foods, the baby has digestive discomfort, diarrhea, change in stool pattern, etc., it is necessary to consult a doctor in time, under the guidance of the doctor for treatment.