Fermented feed for laying hens as well as preparation method and application thereof

The invention discloses a fermented feed for laying hens as well as a preparation method and application of the fermented feed. The preparation method comprises the following steps: sequentially carrying out hydrogen peroxide oxidation and ammonia water pH adjustment on corn steep liquor, uniformly mixing the corn steep liquor with corn bran and wheat bran subjected to steam conditioning treatmentto obtain a raw material mixture, inoculating Baillard yeast and bacillus subtilis, performing aerobic fermentation, then inoculating streptococcus salivarius, performing anaerobic fermentation, andfinally, performing pneumatic drying to obtain the fermented feed. According to the preparation method of the fermented feed for the laying hens, hydrogen peroxide is adopted to treat the corn steep liquor, and sulfite in the corn steep liquor is oxidized, so that adverse effects on animal physiology are eliminated; the corn steep liquor is treated by adopting hydrogen peroxide and ammonia water,and the wheat bran after co