The amount of milk for 7 months old babies has some individual differences depending on the addition of complementary foods, usually around 600-1000ml. For 7-month-old babies, the amount of milk needs to be guaranteed to be around 700-800ml. If the supplementation is good, the milk quantity may need 600-700ml; if the supplementation is not good, the milk quantity may need 800-1000ml. Babies start to add complementary foods at 4-6 months and depending on the response to the addition of complementary foods, the amount of milk to be fed can be decided. Usually, the amount of milk for a 7-month-old baby is about 200-250ml, and the baby needs to be fed 4-5 times a day. In addition, the amount of milk can be influenced according to the baby’s weaning from night milk. As not stopping night milk may affect the baby and parents’ rest, it may also affect the eruption of milk teeth, which is not conducive to oral hygiene. Therefore, it is recommended to add complementary food to the baby in a timely and reasonable manner and gradually reduce the amount of milk.