The benefits of breastfeeding include improving the quality of sleep, which can give the child mental comfort and a sense of security, etc. The disadvantages include choking on milk and causing dental caries. 1. Benefits (1) It can improve the quality of sleep. For babies, breastfeeding can improve the speed of falling asleep as well as improve the quality of sleep. (2) Breastfeeding also gives babies a sense of security and mental comfort when they sleep. 2. Disadvantages (1) Milk sleep is easy to cause choking, sucking milk when the baby is not conscious, milk easily into the throat causing respiratory blockage and choking, is very dangerous. (2) easy to cause dental caries, because the baby sleep saliva secretion is insufficient, the cleaning function of the mouth is reduced, the milk in the mouth for fermentation, resulting in dental caries. Milk sleep has advantages and disadvantages for babies, but it is recommended that as babies grow older, try to avoid the habit of milk sleep.