The quality of upper tobacco leaves is relatively low, which is reflected in the high starchand protein content, poor aroma quality, heavy miscellaneous gas, more irritating, thus resultsin a low value in use. So far, artificial fermentation of processing tobacco in factory isgenerally low moisture (less than20%) solid-state fermentation, in which the tobaccofermentation is very slow and the fermentation cycle is too long. Moreover, it takes up a lot ofwarehouse area. Although increasing the moisture of tob...