The research of modified atmosphere technology can be traced back to 182 1 year, when Berard, a German biologist, discovered that fruits and vegetables can reduce metabolism at low oxygen level. However, it was not until the 20th century that people really began to study the modified atmosphere. Stanley Burg, a professor at the University of Miami in the United States, first put forward the concept of hypobaric storage in the 1960s, and in the 1970s, there was an international research upsurge on hypobaric storage. However, due to the extremely high manufacturing requirements of large-scale decompression vessels, the cost cannot be reduced. This technology can't be industrialized, and it has remained in the laboratory stage. In recent 20 years, modified atmosphere storage has been popularized because of its relatively low cost and obviously superior storage effect to cold storage, and has become the mainstream of modified atmosphere storage at home and abroad It is worth mentioning that this year, Chinese scholars have made some achievements in the research of reduced-pressure modified atmosphere, especially in the production of low-cost reduced-pressure containers, which makes the industrialization of reduced-pressure storage a reality. From 65438 to 0997, China built the world's first 1,000-ton (2,000-ton) decompression storage and fresh-keeping warehouse in Baotou. However, there is still a big gap between China and developed countries in fresh fruit preservation. It is reported that in western developed countries, the fresh-keeping storage of fresh fruits accounts for about 40% of the total fruit output, and the fresh fruits stored in modified atmosphere refrigerators account for 80% of the total storage. In China, the fresh fruit storage capacity of 1996 only accounts for 22% of the total fruit output, about100000 tons, of which refrigeration accounts for 50%-60%, while the storage capacity of controlled atmosphere cold storage is less than100000 tons. The main reason that restricts the popularization of modified atmosphere technology in China is still economic factors. The economic storage capacity for building modified atmosphere storage is 1000 tons, and the investment of modified atmosphere storage of this scale is more than RMB10000, while vacuum storage is more expensive, requiring RMB180000. The investment in fixed assets for building a warehouse equivalent to one kilogram of storage is about 9 yuan, which is obviously too expensive for China, where the price of fruit and vegetable products is relatively low and the economy is underdeveloped. At present, the time for large-scale development of modified atmosphere preservation is not mature.