The amount of milk for a 5 1/2 month old baby is about 150 to 200 ml at a time, and about 800 to 1,000 ml in 24 hours. However, even for babies of the same age, the amount of milk varies depending on their weight. It is important to monitor your baby’s reaction after feeding and adjust the amount of milk. Apart from breastfeeding on demand, 5.5-month-old babies also need to be fed with complementary foods to fulfill their nutritional needs. The choices of complementary foods are egg yolk, fruit puree, vegetable puree, spinach juice, etc. These complementary foods are easily absorbed by the baby. In addition, it should be noted that with the complementary food must be a small number of meals, the baby’s stomach capacity is relatively small, small meals will help the baby digestion. At the same time, if the baby supplemental food to eat more, the amount of milk can be appropriately reduced, need to pay attention to the balance of the two collocation.