Abstract: The steam blasting method was used to treat the corn straw residue for juicing crush storage. Juice can be used directly as industrial syrup for ethanol,marc can be used as a cellulosic ethanol fermentation materials by steam explosion of marc pretreatment.Under the conditions of different steam pressure and time,hydrolysis of cellulose,hemicellulose and lignin cellulose enzyme yield ware researched. As the results,hemicellulose lignin content increases with the steam explosion pressure. The yield of cellulose hydrolase increased with the increase of pressure and maintenance time However, increased pressure had little effect on cellulose hydrolase. The effect of maintaining pressure time on cellulose hydrolase is more prominent. Under the premise of economic cost, 1.2 MPa and 10 min maintenance time were selected as the best conditions, by which the cellulose content is 34.42%, and hydrolysis yield of hemicellulose4.01%,lignin 17.09% and cellulose enzyme hydrolysis is 68.3%,respectively.