Abstract: The climatic conditions in Jinshennong tobacco-producing area were analyzed and the influences of climatic conditions on tobacco quality were studied by using canonical correlation analysis. The results indicated that: (1) The heat and moisture conditions during tobacco field growth period were suitable for high quality tobacco growth. (2) Temperature and rainfall were the main factors affecting the contents of total sugar and nicotine of tobacco. With temperature during earlier stage and ≥10 ℃ accumulated temperature during field period increasing, temperature after tobacco fast growing period and rainfall during every tobacco growth stages decreasing, the nicotine content increased and total sugar content declined. (3) For tobacco sensory quality, temperature during tobacco early growth stage and sunshine hours during every tobacco growth stages had positive effects, and temperature during tobacco late growth stage and rainfall during tobacco mature period had negative effects.