The standard of milk quantity for infants of all months of age is mainly for formula-fed infants, there is no absolute standard, but usually the amount of milk needed by infants per day is generally 150~180 ml per kilogram per day. The correct feeding method is mostly for bottle-feeding, paying attention to the cleaning of the bottle and the feeding position. There is usually no absolute standard for the amount of milk for infants of all ages, and the demand for milk will generally increase as the age of the month grows. Secondly, due to individual differences, some infants will be slightly more milk, some infants will be slightly less milk, but in general, under normal circumstances, the amount of milk needed by infants every day is about 150 to 180 milliliters per kilogram of body weight. In the process of feeding the baby must pay attention to the feeding method, such as bottle feeding should pay attention to cleanliness and hygiene, you can choose a comfortable sitting position to sit still, hold the baby in your arms, let the baby’s upper body leaning on the bend of the elbow, the arm resting on the buttocks, so that the baby’s entire body was about 45 degrees tilt; the other hand to take the bottle, with the nipple gently touching the baby’s mouth and lips, the baby will open his mouth to hold, start sucking.