Exclusively breastfed infants with better physical development can be added to complementary foods at 4-6 months, generally at 6 months. After a certain stage of exclusive breastfeeding, the nutrients and calories in breast milk are not enough to provide all the needs of the baby’s body, and at this stage of development of the infant’s sense of taste, there may be a period of milk aversion, at this time should add complementary foods to make up for the lack of trace elements and other nutrients in breast milk. In general, at 6 months of age, babies can add pureed fruit, meat, vegetables and other complementary foods, and some babies with appropriate weight and height can add complementary foods between 4 and 6 months. In addition, parents in the process of adding complementary foods, but also pay attention to the gradual process, to avoid adding complementary foods too fast, too much, resulting in vomiting, constipation and other digestive problems, while paying attention to the addition of complementary foods balanced nutrition.