Babies can usually sleep through the night from the age of 6 months. However, due to individual developmental differences, the actual situation of each baby is different, and the age at which the baby can sleep through the night is also different. When the baby’s age is small, the capacity of the gastrointestinal tract is limited, and cannot meet the needs of small-month-old babies to sleep through the night, so small-month-old babies can’t sleep through the night, and will wake up at night to take nighttime milk orally, and nighttime milk is important for the growth of small-month-old babies. With the gradual growth of the baby’s age, the sucking power gradually increased, can suck enough milk for the night, accompanied by the synthesis of glycogen, can achieve the situation of sleeping whole night. The situation of each infant is different, some infants can wean themselves from night feeding and sleep through the night, but some infants are more dependent on night feeding and cannot sleep through the night, so they should be weaned from night feeding at this time. When weaning, you can gradually lengthen the duration of night feeding and the amount of night feeding each time, and you can give gentle patting or a small amount of oral warm water and other methods. Gradually wean the baby from night feeding to achieve a full night’s sleep.