Abstract: Effect of different needle insertion height on flue-curing result of loose tobacco leaves were studied in this paper. The results showed that adopted the treatment of back type air distributing plate leaf baking and supporting back mast pin to adjust needle insertion height with the average fresh tobacco leaves length of 75.9 cm and pin height 55 cm, the ratio of producing black grains, steamed and gluten steamed decreased significantly and the average price was high, and the proportion of superior tobacco increased by 21.70-32.90 percentage points and the intrinsic chemical composition of tobacco tended to be more harmonious.