The freeze dryer 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.The pilot-scale vacuum freeze dryer realizes the automation of drying and sublimation. The machine has shelf heating and programmable functions, as well as memory freeze-drying curves, and comes with a U disk extraction function.