There is no fixed standard for the amount of milk for 13-day-old newborns, and it is advocated to breastfeed on demand, with quietness after feeding, no abdominal distension, and ideal weight gain (15~30g/d) as appropriate. The daily milk intake of newborns should be calculated according to the calorie requirement (120kcal/kg), body weight, and tolerance, and follow the principle of gradual increase from a small amount, such as quietness after breastfeeding, no abdominal distension, and ideal weight gain. When there is no breastmilk or less breastmilk, artificial feeding is needed. The newborn’s stomach capacity is small, with the increase in age, the stomach capacity gradually increased, the amount of milk should be increased accordingly. The number of breastfeeding at the beginning of 1~2 hours once, later 2~3 hours once, gradually extended to about 3 hours once, 3 months after the night sleep gradually extended, can be omitted once the night milk, the number of feeding times should be not less than 8 times a day, after 6 months with the addition of complementary foods, breastfeeding times can be gradually reduced. Newborns should be fed on demand according to their weight to meet their growth and development needs.