The amount of milk a day for an eight-month-and-twenty-day-old baby is around 600-800 milliliters. Every baby is different, so the amount of milk in a day is different, about 600-800 milliliters, but there are some variations. Some babies have a large milk supply, which may reach about 1000 ml, while others have a small milk supply, which may only reach about 600 ml. After 4-6 months of age, babies can add cereal-based pureed foods to supplement their energy needs, and as the amount of food added rises, the amount of milk can be reduced accordingly. The addition of food should follow the principle of from one to many, from a small amount to a large amount, from thin to thick, from fine to coarse, and should be added when the infant is healthy and has normal digestive function. Eight months is in a very important stage of growth and development, must pay attention to observe the baby’s milk situation, more to the baby to eat some nutritious food, can be appropriate to add rice flour, rice crackers, porridge and other foods, but also can be appropriate to eat some vegetables and fruits. Usually it is best not to give the baby too much food at once, so as not to cause indigestion.