Although breast milk is the most suitable nutrition for infants, after 6 months of age, infants’ digestion, absorption and metabolic functions are becoming more and more perfect, so it is difficult to meet the growth and nutritional needs of infants with only dairy foods. Therefore, it is necessary to gradually add complementary foods and prepare for weaning. First, the baby can add complementary food signal performance In general, the baby needs to add complementary food when there are some clinical manifestations, as follows: 1, the head can be kept upright; 2, appetite increased; 3, significant weight growth; 4, stop spitting tongue reflex. Second, the baby complementary food addition process Usually after the baby reaches 6 months, the weight of 6.5-7kg, can maintain a stable posture, available spoon feeding, etc., you can start to add complementary foods. However, different growth stages, its complementary food add different kinds, as follows: 1, 6 months: the baby salivary glands are more fully developed during this period, and secretion enough, can add iron-containing formula rice flour or cereal; can also be made into a puree of vegetables and fruits, fed with a small spoon to supplement vitamins and minerals; 2, 7-9 months: the baby’s milk teeth have erupted during this period, you can add some soft and rotten food, such as rotten noodles 3, 10-12 months: this period of baby’s digestive function is further improved, you can add soft rice, minced meat, minced vegetables, eggs, soy products, fruit, etc.. Third, the baby complementary food adding principles baby add complementary food need to pay attention to certain principles, such as complementary food cooking is not soft, or add too much at a time, or too many varieties, etc., can lead to baby indigestion, causing diarrhea. Therefore, in the process of adding the following points should be noted: 1, from less to more: the initial amount of complementary foods can be added less, and then gradually increase, not too hasty; 2, from thin to thick: the transition from rice soup to porridge, and then transition to cookies, buns, etc.; 3, from one to many: it is recommended to add only one at a time, so as to avoid indigestion or allergic reactions, if the mental appetite are normal, then add a second; 4, ingredients Fresh: When adding complementary foods, you should also pay attention to the timing and quantity, fresh ingredients, and pay attention to hygiene.