Abstract: The new flue-cured tobacco variety Liaoyan 20, a new male-sterile hybrid variety, was developed from MSK326 as female and Speight G-70 as male parent. After years of research on botanical traits, agronomic characters, economic characters and resistance identification, the results showed that:Liaoyan 20 had strong growth potential and grew rather uniformly in the field. Liaoyan 20 was moderately resistant to black shank and root knot nematode. Its resistance to CMV and TMV was better than that of the control variety NC89. Its main economic traits were significantly better than the control. The results of industrial evaluation showed that the chemical composition and physical properties of Liaoyan 20 were slightly better than that of the control, and the sensory quality was better than that of NC89. Its promotion score of industrial enterprises was obviously better than the control. Its main characters of quality, resistance and economic efficiency were coordinated, and the sensory quality was better than that of NC89. The results showed that Liaoyan 20 is suitable to be promoted to the major flue-cured tobacco leaf production areas in Northern China.