Biomass component efficient separation method and application in preparation of feed additive

The invention discloses a biomass component efficient separation method and application in preparation of a feed additive, and belongs to the technical field of wood fiber biomass pretreatment separation and animal feed production. According to the separation method, a composite clay-based catalyst and protonic acid coupling system is adopted, and wood fiber biomass is pretreated; treating the obtained suspension, collecting filtrate and filter residues, purifying the filtrate to obtain a liquid component rich in lignin micromolecules, oligosaccharides and polyhydric alcohols, and drying the filter residues to obtain a high-purity cellulose component. According to the method, a Mo/SiO2-Al2O3-Ce2O3 composite clay-based catalyst coupling protonic acid system is constructed, efficient fractionation and conversion of wood fiber biomass components are achieved under the relatively mild condition, liquid phase components can be further applied to preparation of feed additives, the technological process is simple, a