Expressed breastmilk can be kept for about 1-2 hours in summer, 3 hours in winter and up to 6 hours in the refrigerator. The storage time of pumped breastmilk is closely related to the environment. In summer, when the temperature is higher, the storage time is shorter. In winter, the temperature is lower and the storage time is longer. Refrigerating breastmilk for up to 6 hours ensures that the components of breastmilk are not damaged. Breastmilk is the safest and most natural food for babies, rich in calcium and phosphorus metabolites, which can provide babies with rich nutrition and calories, and ensure that babies are not prone to colds after absorbing immunoglobulins. Therefore, breastfeeding is very important. In order to ensure the safety of breastmilk, the nipples must be cleaned frequently to avoid bacterial growth and mastitis, which can provide a safer way of breastfeeding for babies. When sucking out breastmilk, you should pay attention to the cleanliness and cleanliness of the sucking tools and bottles, which is very important for the safety of infants and young children. Breastmilk must be preserved in a special breastmilk preservation bag. When consuming breastmilk, first put the breastmilk from the emergency freezer into the preservation room and thaw it completely before putting it into the simmer to heat up and consume it, and the heating temperature must be at 38℃-39℃.