The invention provides a compound enzyme preparation, a method for preparing a feed from the compound enzyme preparation and an animal feed, and relates to the field of preparation of feeds. The compound enzyme preparation is compounded from alkali protease and flavored protease, wherein the mass ratio of the alkali protease to the flavored protease is (3 to 1) to (4 to 3), the alkali protease iscompounded from keratinase, papain and cellulase, and the flavored protease is compounded from neutral protease, aminopeptidase and maltodextrin. The method comprises the following steps of compounding beef waste yeast as a raw material into a yeast solution with a preset concentration, performing uniform dissolving, adding ethyl acetate, preheating the yeast solution, adding the compound enzyme preparation, performing an enzymolysis reaction to obtain enzymatic hydrolysate, and performing spray drying on the enzymatic hydrolysate. According to the compound enzyme preparation, the method for preparing the feed from the compound enzyme preparation and the animal feed disclosed by the invention, shortening of the self-dissolving time of yeast is facilitated, the enzymolysis degree is increased, the palatability of a yeast self-dissolving animal feed is improved, besides, the content of small-molecule nutrient components in the feed is increased, and the industrial production efficiency is improved.