Abstract: The objective of this study was to investigate the relationship between chemical components of flue-cured tobacco and manifestation of full aroma style through analysis of 120 samples of middle leaves of tobacco from the full flavor tobacco growing region of Luoyang. The results of regression analysis and descriptive statistical analysis indicated that the full aroma style was better manifested when the content of total alkaloid ranged from 2.0% to 2.5%, the potassium content was 1.6% or higher, the sugar-nicotine ratio was at about 10, the ratio of potassium to chlorine ranged from 5 to 7 and the ratio of nitrogen to nicotine ratio was around 0.7. The regression model of flue-cured tobacco typical style and routine chemical composition was established using stepwise regression analysis. The correlation between style index and chemical composition was analyzed. The results indicated that the manifestation of full aroma style value positively correlated with the total alkaloids content and the ratio of sugar nicotine, and negatively correlated with chlorine content, the ratio of potassium to chlorine and nitrogen alkali.