In general storage is that there will be such demand for vegetables, in order to maintain its required temperature storage. Because, the temperature dropped to -15 ℃, vegetables freezing rate, microorganism and enzyme activity, basically stop growth, oxidation is also very slow. So food can be stored for long periods of time, and has good storage quality. In addition, frozen fruits and vegetables also seeks to relatively stable internal temperature, temperature too big wave motion will cause spoilage in fruits and vegetables.