Abstract: The yellow flaur was taken maize as substrate and the alkaline protease was adopted for hydrolysis .The two timesrotated regression and design was used.By the three factors of processing ,namely,temperature,rate of enzyme to substrateconcentration and pH.The optimum conditions of hydrolysiso of yellow maize flour were: [S]=8%、 [E]/[S]=3.3%、pH =9.85、T =45℃and hydrolysises time (t) =4.5h. The rate of recovery of albumen under the hydrolysis conditions was > 73%.

Key words: Maize petide , Enzyme hydrolysis , Hydrolysise degree , The rate of recovery of albumen