Compound feed for relieving lamb stress, and preparation method and application thereof

The invention particularly provides a compound feed for relieving lamb stress. The compound feed is prepared by adopting multiple mineral elements and vitamins as raw materials, compounding bacillus natto, bacillus subtilis and lactic acid bacteria into compound probiotics, and combining the compound probiotics with yeast culture, probiotics, trehalose and skim milk powder. The compound feed has good effects on improving and solving transition stress, feed changing stress, weaning stress, immune stress, management stress and immune stress and preventing enterotoxaemia caused by clostridium welchii; the feeding transition time is short; after transition, the feed intake and the weight increase are not lower than 20% compared with those of a control group; furthermore, supplementary feeding of pasture is not needed; the compound feed can be used in cooperation with conventional feed; and the compound feed can significantly reduce the feeding cost, is safe and reliable, and has wide development value for lamb br