It is within the normal range for a three-month-old baby to consume about 500ml of breastmilk a day. The main source of energy for three-month-old babies is usually breast milk. the daily energy requirement for three-month-old babies is 67kcal/kg, while the calorie content of breastmilk is 90kcal/100ml. based on the average body weight of newborns in China, the average body weight of three-month-old babies is 6.5kg, so the energy requirement is 67×6.5=435.5kcal, and the amount of breastmilk that needs to be consumed is 435.5/ 90=484ml. As there are individual differences in the weight of babies, it can be calculated according to the above formula combined with the specific weight, and the calculated values are for rough reference only. Since three-month-old babies are small, if they drink a large amount of milk, they are prone to indigestion, and if they drink a small amount of milk, they may not have enough nutrients. Pregnant mothers need to pay attention to the need to feed, according to the baby’s specific circumstances to adjust the amount of milk feeding.