Abstract: In order to study the adsorption characteristics and key factors for saturated glycerol adsorption by reconstituted tobacco samples for electrically heated tobacco products (hereinafter referred to as reconstituted tobacco products), the saturated adsorption capacities and desorption capacities of different reconstituted tobacco materials to glycerol in programmed temperature range (30-350 ℃) were measured by chemisorption. The relationships between the surface properties of reconstituted tobacco materials and the saturated glycerol adsorption were characterized through the amounts and adsorption mechanisms of glycerol and the specific surface areas, pore size distribution and surface functional groups of reconstituted tobacco materials. The results showed that: 1)Higher specific surface areas and larger pore sizes facilitated the glycerol adsorption by the reconstituted tobacco materials. Besides, the abundant surface oxygen-containing functional groups increased the strength of hydrogen bond between functional groups and glycerol, which was beneficial to glycerol adsorption. The formation of hydrogen bonds not only improved the adsorption capacities but also enhanced the glycerol' s adsorption strength. 2) Higher moisture contents in reconstituted tobacco materials resulted in higher amounts of surface oxygen-containing functional group, and thereby improved glycerol adsorption by the reconstituted tobacco materials.