The green storage method can ferment the nutrients of crops into easily absorbed components through lactic acid bacteria in the environment without air, so as to minimize the loss of nutrients from harvest to feeding. No matter what system is used, the main purpose of green storage and storage system is to remove air during green storage and isolate air during storage. Harvesting speed, moisture content, crop length and compactness will have a great impact on the fermentation process and storage loss. Generally speaking, effective fermentation can bring more delicious and digestible feed, which can maximize the nutrition of crops. At the same time, it can improve the quality of milk produced by animals and increase their meat production rate.