The freeze-drying machine is a technical method in which the aqueous article is previously frozen and then the water is sublimated in a vacuum state to obtain a dry product. The freeze-dried article is easy to store for a long period of time, and the water can be restored to the pre-freeze form Keep the original biochemical characteristics.For freeze-drying technology, such as antibiotics, vaccines, blood products, enzymes, hormones and other biological products, can show its superiority, suitable for food,vegatable fruit production.