It is recommended that breastmilk should not be stored for more than 3 hours at room temperature. If you want to keep it for a longer period of time, you can place it in a place with lower temperature such as a refrigerator. Breastmilk has very high nutritional value, for example, there are amino acids, lactase and other should nutrients, can make the child get comprehensive nutritional support, promote physical development. At the same time, many active factors in breastmilk have a better protective effect on the baby’s intestinal tract and enhance the baby’s immunity. However, if breastmilk is left for a long time, its nutritional value will be greatly reduced, and may even cause intestinal diseases in infants. Therefore, it is recommended that breast milk can be placed at room temperature for 2 to 4 hours, at 0 ℃ to 4 ℃ degrees can be placed 10 to 24 hours, below -18 ℃ can be stored for several months. It should be noted that the sucked out breastmilk needs to be placed in a sealed milk storage bag to prevent contamination, leading to bacterial infection, if the maternal body and time permits, it is recommended that babies suckle directly at the breast. In addition, mothers should pay attention to hygiene in their normal life, bathe regularly, clean nipples, and change underwear frequently to reduce the chance of breast disease.