Abstract: In order to find out the main factors influencing the sensory quality of flue-cured tobacco in Chongqing tobacco growing areas,the relations of appearance quality,physical properties,chemical components,and the harmony between those components with the sensory quality of tobacco were investigated with canonical correlation analysis.The results showed that the total sugar content in tobacco leaves was moderate or higher,the ratio of sugar to nicotine was slightly higher;the contents of reducing sugar,nicotine,total nitrogen and the ratios of nitrogen to nicotine and potassium to chloride were appropriate;while the contents of potassium and chloride were lower.The aromatic quality of tobacco leaves mainly affected by and positively correlated to total sugar,the difference between total sugar and reducing sugar,the ratio of nitrogen to nicotine,leaf color and body.The smoke concentration and impact mainly affected by and positively correlated to nicotine,total nitrogen,weight per unit leaf area,leaf oil and body,while affected by and significantly negatively correlated to potassium and the ratios of sugar to nicotine and potassium to chloride.Offensive odor mainly affected by and positively correlated to total sugar,the ratio of nitrogen to nicotine and the difference between total sugar and reducing sugar.Smoke sweetness mainly affected by and positively correlated to the ratio of nitrogen to nicotine and the difference between total sugar and reducing sugar.