As the child grows older, breastfeeding and mixed feeding cannot meet the nutritional needs of the child and supplementary foods must be added. With the eruption of milk teeth, chewing fully, digestive function gradually mature, the diet should also change from liquid to semi-liquid, semi-solid and solid, and gradually transition to the diet of older children and adults. Generally, a certain amount of complementary foods should be added at 4-6 months of age to supplement the nutritional deficiencies of human milk and other dairy products, and to prepare for weaning. Some children are still not able to eat solid food at the age of 2-3 years, and every time they eat solid food, they choke easily, and parents think that their children have a particularly thin throat. In fact, this is the result of not paying attention to the gradual change from liquid to solid food. Complementary foods should be added when the infant is healthy and has normal digestive function. It should also be done sequentially according to the needs of the infant and the maturity of the digestive system. It should be followed from less to more; from thin to thick; generally accustomed to one kind of food before adding another, do not add several foods at the same time. At the same time, pay attention to the child’s stool and appetite, such as diarrhea, vomiting and other symptoms, should first suspend the addition of a few days to wait for the child to return to normal and then try to add again. Do not be too hasty or delayed. Age Complementary food 1-3 months Juice, cod liver oil 4-6 months Rice soup, rice paste, thin porridge, egg yolk, fish puree, vegetable puree 7-9 months Porridge, rotten noodles, minced vegetables, whole egg, fish, liver puree, minced meat, tofu, steamed bun 10-12 months Porridge, soft rice, noodles, soy products, minced vegetables, minced meat, stuffed food