Abstract: To study the influence of different aging modes on aging effects of flue-cured tobacco CB-1, changes of moisture content, pH value, chemical composition, iodine value and sensory quality of tobacco leaves during natural, standard and cave aging were compared and analyzed. The results showed that moisture content and iodine value increased with aging time during 6 to 21 months, pH value, starch, nitrogen, protein and nicotine contents of tobacco leaves under three aging modes decreased with the increase of aging time, while water-soluble total sugar, reducing sugar contents and sensory quality evaluation scores increased first and then decreased. The moisture content of tobacco leaves was the lowest, however, the pH value of these leaves was the highest under the cave aging mode. The contents of nitrogen, protein, nicotine and total evaluation scores in tobacco leaves under the cave aging mode were higher than those under the standard and natural aging modes. The iodine value of tobacco leaves under the standard aging mode was higher than that under the natural and cave aging modes. The suitable aging duration of tobacco was from 15 to 18 months under the natural aging mode, from 12 to 15 months under the standard aging mode, and from 18 to 21 months under the cave aging mode. The tobacco leaves showed the fastest aging rate with the standard aging, but had the longest shelf life with the cave aging.