In Germany, food preservation is very scientific and reasonable. Whether it is meat, fish, or vegetables, fruit, from the place of production or processing plants to sales outlets, as long as the flow into the field, these foods are always in a cold chain to meet the product quality requirements of the channel to run. The large-scale refrigerated refrigerated trucks are responsible for the connection among production sites, processing plants, and sales points. In refrigerated and fresh-keeping warehouses, all of them are air-cooled. Fans regulate the temperature under the control of the computer. Leafy vegetables can be stored for 2 to 5 days in this cold storage. Meat packaging generally adopts vacuum or gas-containing packaging. German meat packaging and gas-containing and fresh-keeping packaging machines are very fast. Compared with vacuum fresh-keeping packaging, gas-containing and fresh-keeping packaging is obviously superior to vacuum in terms of color, exudate, etc. package. Advanced food preservation packaging technology is extremely beneficial to the market demand for foodstuffs. Recently, German food preservation packaging has a wide range of varieties and is scientific and reasonable. For example: melons and fruit packaging, vegetable packaging as long as the tubers are not easy to crush all use small mesh bags (plastic wire weaving) bags; for vulnerable products, such as melons with cardboard boxes, carton permeability is good; for meat , There are frozen, vacuum and gas-containing packaging. In the meat processing plant in Oldenburg, raw meat has a large refrigerated vacuum bag every 500 kg and a large plastic container. In supermarkets and shops, sliced ​​cooked products are vacuum packed or inflated. The leafy vegetables are generally stacked in parallel in the turnover box. A small amount of products are boxed, but the boxed products have good air permeability and no obvious condensation. In the Dortmund Wholesale Market, vegetables, fresh fish, and meat are stored in a well-preserved environment. After the vegetables have been cleared and processed, they are stored in boxes in plastic insulated plastic boxes with ice cubes.