Breastmilk storage time at room temperature is temperature dependent, 20℃-30℃ room temperature can be stored for 4 hours. The storage time of breastmilk at room temperature depends on the local ambient temperature. The air contains a large number of bacteria, and too much time will lead to a large number of bacteria multiplying in the breastmilk. Generally expressed breastmilk can be kept at 20℃-30℃ for 4 hours, and in an ice box at about 15℃ for about 24 hours. Breastmilk can also be stored in the refrigerator or freezer, 2 ℃ – 4 ℃ conditions do not open too much can be kept for 2 days, if the refrigerator door is opened frequently can be kept for about 24 hours. In addition, the general spring, fall and winter preservation time is relatively long, summer needs to be shortened accordingly. If the mother has enough milk, it is not recommended to express the milk stored for too long to ensure the quality of milk. At the same time, it is recommended that mothers eat more fresh fruits and vegetables, drink more water, ensure a certain amount of protein intake, and maintain breast hygiene.