According to statistics in the United States, there are more than 100 kinds of food produced by freeze-drying technology in the world (2005), which can be divided into the following categories.

(1) Cooking ingredients: meat, eggs, fish, shrimp, shellfish, sea cucumber, and vegetables.

(2) Seasoning foods: green onions, ginger, garlic, spices, pigments, soups.

(3) Fruits: apples, bananas, pineapples, strawberries, pears, peaches, etc.

(4) Drinks: coffee, tea, fruit juice, vegetable juice.

(5) Health foods: ginseng, yam, honey, turtle, cordyceps.

(6) Native products: mushrooms, day lily, toon, etc.

(7) Food industry raw materials: egg material, bean material, dried fruit powder, vegetable protein powder, etc.

(8) Special foods: foods for field operations such as aerospace, navigation, military, mountaineering, and expeditions.

In recent years, the demand for freeze-dried food in Europe, the United States and Japan has increased rapidly. In Europe, freeze-dried foods account for 50% to 70% of all dehydrated foods; among the convenience foods in the United States, freeze-dried foods account for more than 50%; among the dehydrated foods on the Japanese market, freeze-dried foods account for nearly 60%. Nevertheless, Britain, Germany, the United States, Japan and other countries need to import a large amount of freeze-dried food every year. The varieties include onions, asparagus, cabbage, carrots, mushrooms, potatoes, as well as beef, eggs, fish and shrimp. The import volume of freeze-dried vegetables and freeze-dried fruits in Nordic countries such as Sweden, Norway, and Denmark is still increasing year by year.

The price of freeze-dried food in the international market is 4-6 times that of hot-air-dried food, and it is gradually becoming a bulk food in international trade. According to the statistics of the General Administration of Customs, since the mid-1990s, the annual export volume of dehydrated vegetables from the mainland of my country has increased at an average rate of 30%; the export volume of dehydrated vegetables from the mainland of my country exceeds 1/2 of the total global output, plus Taiwan exports The volume accounts for about 2/3 of the world's total output.

my country is a large agricultural country with abundant vegetables (including native products), meat and aquatic resources. It applies freeze-drying technology (domestic freeze-drying equipment is only 1/3~1/2 of imported equipment). Freeze-dried vegetables, freeze-dried beef, freeze-dried fresh eggs and other bulk foods are sold to the international market. It is an export-oriented foreign exchange earning project with promising prospects, high profits and low risks. At present, the freeze-dried food produced by freeze-drying machines in my country is basically externally demanded, mainly including cooking raw materials, food industry raw materials, seasoning foods and health foods, with an annual output of less than 20,000 tons. According to industry forecasts, in the next ten years, my country's external demand and domestic demand freeze-dried food will enter a stage of substantial growth; by 2015, there will only be one kind of instant noodle auxiliary, and freeze-dried food will require about 50,000 to 60 000, t plus The consumption of fast food ingredients, soups, drinks, etc., and freeze-dried food will exceed 150,000 tons. The huge demand for freeze-dried food in domestic and foreign markets provides a great opportunity for the development of my country's food freeze-drying technology and freeze-dried food industry.