The invention relates to a high-quality enzymolysis-fermented bean pulp as well as a preparation method and application thereof. The preparation method comprises the steps of crushing peeled bean pulp, sieving by virtue of an 80-mesh sieve, carrying out primary enzymolysis by virtue of alpha-galactosidase and glucoamylase, carrying out secondary enzymolysis by virtue of papain, carrying out enzyme deactivation, inoculating a compound strain of saccharomycetes, bacillus and lactic acid bacteria, sequentially carrying out aerobic fermentation and anaerobic fermentation to obtain a finished product, and carrying out spray drying on the finished product, so as to preserve active components to the greatest extent. The prepared enzymolysis-fermented bean pulp has the special fermentation flavor, the protein content is about 55%, the acid soluble protein content is more than 50%, antinutritional factors such as antigens are fundamentally eliminated, the components are stable, and the enzymolysis-fermented bean pulp has the characteristics of strong hydrophily, high water holding ratio and strong palatability and has an obviously food calling effect on aquatic animals; and the enzymolysis-fermented bean pulp is rich in functional small peptides, probiotics and metabolite of the probiotics, beneficial to the nutrient balance of intestinal tract of bred animals and is suitable for being added into feeds of piglets, poultries, pets, aquatic products and the like, the problem of trophic diarherra of the animals is solved, and the suggested use ratio is 2%-5%.