Silage production aims at transforming green feed into long-term preservation feed,while retaining its better nutritional value and palatability.A large number of probiotics can be produced after feed silage,which plays an important role in protecting the intestinal health of livestock and poultry and improving the immunity of the body.In this paper,the classification of raw materials,methods and technical processes for making silage are summarized in order to provide references for the popularization and application of new technology of wrapped silage.