Pervaporation as a new type of membrane separation technology, its outstanding advantage is the ability to realize distillation, extraction, absorption separation of traditional methods, such as difficult to complete tasks, with high efficiency, energy saving, environmental protection, without introducing the advantages of the third component. Use inorganic pervaporation membrane pilot plant production of cellulosic ethanol concentration of ascending dehydration experiment, examine with the device of ethanol dehydration effect, provides reference for industrial amplification.