In order to deeply understand the characteristics of heat-not-burn (HNB) cigarette tobacco materials prepared by different processes and their effects on the characteristics of cigarette products, four kinds of sheets with different flavors prepared respectively by rolling press (RP) , slurry process (SP), paper-making process (PP) and air-laid process (AP) were analyzed by chemical composition analysis, thermal cracking analysis and thermal weight analysis. The results are as follows. ① RP and SP tobacco materials had a low fiber content and tight structure, while PP and SP tobacco materials had a relatively high fiber content and loose structure. ② Water content of cigarette tobacco materials in HNB was similar, and the nicotine content ranged from 6.68 mg/g to 13.56 mg/g. The content of glycerol was higher than that of propylene glycol, and much higher than that in traditional cigarettes. ③ With the increase of cracking temperature, the release volume of cracking aroma of tobacco materials increased first and then decreased, peaking at 270 ℃ and then slowly decreased. The components of cracking aroma have their own characteristics. ④ TG in tobacco materials of HNB cigarettes could be divided into four stages. The main weight loss stage was the second stage and the third stage, there are some differences in the thermal weightlessness of tobacco materials.