Abstract:Small farms and farmers are the main body of grassfed livestock breeding in my country, but they are also the main source of spoiled silage. Silage preservatives can solve the problem of spoilage during the silage process. The air discharge technology is to discharge the residual air in the bagged silage, artificially creating an anaerobic environment, preventing the growth of aerobic saprophytic bacteria and other microorganisms that are not conducive to silage, and conducive to the full fermentation of lactic acid bacteria. The combination of these two technologies has significantly improved the quality of bagged silage for small farms and farmers.