Abstract: 【Objective】 This study aimed to lay a basis for the extension of flue-cured tobacco variety Y2001.【Method】 The agronomic characteristics,disease resistance and chemical components of the cured tobacco leaves of Y2001 were studied and analyzed,with the flue-cured tobacco variety Zhongyan 100 as the control.【Result】 Compared with Zhongyan 100,the plant height of Y2001 increased by 4. 39 cm and its leaves increased 1 in the number at maturity. The incidence rates of root black rot,TMV,Alternaria alternate and bacterial wilt decreased by 3. 73%,3. 12%,1. 38% and 0. 04%,respectively. After curing,the proportion of medium tobacco in tobacco leaves increased by 2. 65%,and the average price increased by 0. 64 yuan/kg. The total alkaloid content decreased by 0. 26%,the total nitrogen content increased by 0. 11%. The total organic acid increased by 12. 3 mg/g,and the total aroma except neophytadiene increased by 35. 64 μg/g.【Conclusion】 Compared to Zhongyan 100,Y2001 has a higher single-leaf yield,the improved aroma quality,and a higher value of promotion.