In order to improve cultivation practices and promote leaf quality, the stalk of tobacco plant was girdled after topping. The results showed that the girdling affected physical characters and smoking quality of flue-cured tobacco leaves greatly. The maturity of upper and middle leaves increased, the proportion of light yellow middle leaves was reduced, the proportion of orange upper and middle leaves, aroma quantity and quality were raised, the taste and intrinsic quality of leaves were obviously improved by girdling.