Breastmilk can be stored for 3-6 months under the condition of freezing at -20℃, and frozen breastmilk should be fed to babies within 4-6 hours after thawing. Thawed breast milk that has been heated, if the baby does not eat it all at once, it cannot be stored in the freezer or refrigerator, nor can it be heated again to feed the baby, it needs to be discarded in time. Therefore, it is better to take a special small package of milk storage bag to store breast milk when you freeze it. When feeding frozen breast milk to your baby, you need to thaw and heat the breast milk according to the amount your baby eats. In principle, it is better to have less than too much thawing to avoid waste.