Long-term storage method of grain dreg type feed

The invention discloses a long-term storage method of a grain dreg type feed. The storage method is realized by adding feed-grade ammonium chloride (NH4Cl) into the grain dreg type feed according to a certain proportion. To ensure the storage effect, the ammonium chloride accounts for 0.2-0.5% of the fresh weight of the grain dreg, generally 0.3-0.4%. The method can be applied to grain dreg type feeds of which the water contents are within 20-95%, the storage period can be more than 1 year, and remarkable anti-fly effects are achieved; and the grain dregs stored by using the method are suitable for being used as feeds for ruminants such as cows and sheep. The long-term storage method is simple to operate and low in cost, and has a good application prospect.