The invention discloses a method for improving K326 cured tobacco variety. The method comprises the steps of: selecting muscat hamburg grape as a root stock and K326 cured tobacco seedling as a scion, grafting in the first ten days of May by adopting a whip grafting method, and transplanting the survived grafted plants to field. According to the invention, the muscat hamburg grape and K326 cured tobacco variety are subjected to distant hybridization for the first time; by virtue of grafting, the disease and pest resistance of the new plants is improved, and the new plants not only have the characteristics of 326 cured tobacco variety, but also have specific fruity essence of muscat hamburg grape; and the essence quantity and essence quality of the tobacco are improved.