Five months can add complementary foods, to follow the principle of adding complementary foods, such as from less to more, from one to more. Clinically, it is recommended to add complementary foods at the age of four to six months. Five-month-old infants can start to add complementary foods, at this time, the infant’s nutritional needs are gradually increasing, and the addition of complementary foods can satisfy the body’s needs, which is conducive to their normal growth and development. Five months to follow the principle of adding complementary foods is from less to more, from one to many, from fine to coarse, from simple to complex this process, complementary foods set between meals, the need for regular, quantitative. Five-month-old infants to add complementary foods to observe the body’s response, there is no nausea, vomiting, diarrhea, rashes, crying and restlessness and other manifestations of discomfort to find out the reasons, and then targeted treatment. In addition, if there is any discomfort after adding complementary foods, it is necessary to suspend the feeding of complementary foods first.