This can ensure the freshness of the pie. Generally, raw pies are put into fresh-keeping bags and then frozen in the refrigerator, which can be stored for 7~ 10 days. Freezing can prolong the storage time of food and prevent food from going bad. It is a very good way to preserve food. Although the freezing room temperature is relatively low, it can also ensure that the raw pie does not deteriorate, but it can not be kept forever. Pay attention to the preservation time and try to finish it in a short time.