Bored bean is a kind of fabaceous crop, which has rich starch, high protein, low fat and plentiful lysine. But because of growing inhibitor, competitive checking thing, fat, oxide and affection of plenol enzyme active Milady Reaction, it forms some problems of anti-nutrition factor, broad bean yellow, bean stench and brown spot, and affects the deep development of broad bean and absorption of nutrition for haman and animal. Taking physico-chemical or biological methods, eliminating and decreasing nutritive composition, it can be improved to absorb and use nutrition.