By means of X-ray diffraction (XRD), the authors studied the mineral components of cigarette ash from 28 kinds of Chinese-produced cigarettes as well as cigarette paper ash, cut tobacco and filter tip of 2 kinds of cigarette (Green Nanjing and Yunyan). The preliminary results obtained show that there is whewellite in cut tobacco, filter tip contains no minerals, and calcite is the dominant mineral composition in cigarette ash. Besides calcite, small amounts of quartz, sylvine, arcanite and gypsum are also existent in the cigarette ash. It is considered that these materials are derived from different sources: calcite comes from cigarette paper, whewellite is crystallized during the growth of tobacco leaf itself, and gypsum is formed in the combustion process of cigarette. These results provide scientific evidence for the comprehensive understanding of nosogenesis of cigarette.