Using rice bran as materials, effects of the concentration of NaOH, H₂O₂ concentration and temperatureon the yield of arabinoxylan were examined by means of quadratic general rotary unitized design of the single factortest. The results showed that the highest yield of arabinoxylan was got when the concentration of NaOH was 0.72mol/L and H₂O₂ concentration was 1.25% at temperature of 66℃. Under this conditions, the yield of arabinoxylanwas 23.47%, and its purity was 66.31%.