Aloe polysaccharide extraction method and use thereof in cigarette

The invention discloses an extracting method of aloe polysaccharides, and the application thereof in cigarettes, wherein, the extracting method comprises the following steps: (1) fresh aloe leaves are crushed, centrifuged and filtered to obtain pure aloe raw juice; (2) after going through the steps of microwave extraction, centrifugal separation and concentration, water is added into alcohol, mixed, rested and filtered and crude aloe polysaccharides is obtained by settlement collection; (3) the filtrate goes through a nanofiltration membrane and an ultrafiltration membrane respectivcely for nanofiltration and ultrafiltration and then is frozen and dried; and (4) after being dissolved by water, the aloe polysaccharides is applied to tobacco shreds during a feeding process in a spraying manner so as to improve the moisturizing effect of the cigarettes; when being smoked, the dry sensation of the cigarettes is reduced, no undesirable odor exists in the smoke and the saliva of smokers is enriched. The extracting