Abstract：The main advantage of food vacuum freeze-drying technique is keeping the color，smell，taste, quality and the shape of the food. It can maintain maximum the nutrients, such as vitamins, protein etc. And it has a good rehydration, which can save a long time at the room temperature. Vacuum freeze-drying food has been widely used in convenience food, prepared food and so on.Vacuum freeze-drying technique is a high technological content and widly used technology.The products with green, convenient and healthy character, are more and more in people's graces. The pater introduced the principle of the vacuum freezy-drying technology，the technology process and operation points,the character,the applications and present situation at home and abroad and its development trend．
2010, Vol. 24 
