Sucked out milk can be kept in the refrigerator for about 24 hours to 48 hours. The sucked out milk can be stored in a special breast milk bag, keep the refrigerator temperature at about 4 degrees, and minimize the opening and closing of the refrigerator, generally can be stored for 24 hours to 48 hours; if it is necessary to long time preservation, then you can milk out of the milk in the refrigerator freezer this can be stored for up to two weeks or so. However, it should be noted that the storage of milk is required to be strictly sterilized. When you take it out, you need to observe whether the milk has flocculent precipitation or other color changes, and at the same time, you need to place the milk at a suitable temperature before feeding, to avoid diarrhea in infants. The milk is very susceptible to protein denaturation and bacterial growth when stored in the refrigerator for a long period of time, so it is not recommended to store it in the refrigerator for a long period of time.