In preterm infants, it is generally recommended to start complementary feeding at 6 months of corrected gestational age. Corrected gestational age means correcting the time after birth and the time of normal labor. For example, if you have a preterm labor at 33 weeks and a normal preterm labor at 37 weeks, you are 4 weeks, or about 1 month, premature. And correcting the gestational age of 6 months means that the time after birth is 7 months, and you can usually add complementary foods after seven months. Generally, preterm infant formula is more suitable for the growth and development needs of preterm infants, and has a higher calorie content, which enables preterm infants to have enough calorie intake to enable normal body development to catch up with normal newborns. Simply through the milk powder to supplement nutrients may not be able to meet the needs of the need to increase supplemental food to supplement the calories, add supplemental food can be a small amount of supplemental rice flour and other starchy foods to start, and then add some animal foods, such as egg whites and so on gradually increase a variety of supplemental food. If a preterm baby needs to add complementary foods, it is recommended to go to the hospital to consult the relevant doctors, under the guidance of the doctor to add complementary foods.