Method for preparing animal model of autoimmune diseases using phytate feed

The present invention relates to: a method for preparing an animal model of autoimmune diseases or chronic kidney disease-bone mineralization disorders, comprising the step of administering phytate to an animal excluding a human being; a feed composition for preparing an animal model of autoimmune diseases or chronic kidney disease-bone mineralization disorders, containing phytate as an active ingredient; an animal model of autoimmune diseases or chronic kidney disease-bone mineralization disorders, prepared by the method; a method for screening a therapeutic agent of autoimmune diseases or chronic kidney disease-bone mineralization disorders using the animal model of autoimmune diseases or chronic kidney disease-bone mineralization disorders; a pharmaceutical composition for preventing or treating autoimmune diseases or chronic kidney disease-bone mineralization disorders, containing phytase as an active ingredient; and a food composition for preventing or alleviating autoimmune diseases or chronic kidney disease-bone mineralization disorders, containing phytase as an active ingredient.