Abstract: To be more scientific and objective, 9 climatic indexes of 18 growing areas in Yunnan were analyzed by combining single evaluation with combined evaluation method. And combined evaluation models for climatic indexes were established based on method sets. Through the validation of these combined evaluation methods before and after event, mean value method was recognized as the optimal method, it overcame the one-sidedness of single comprehensive evaluation method to a certain extent and was superior to the other combined evaluation methods in compatibility. Mean value method was more representative and reliable, it was suitable for the comprehensive evaluation of climate indexes of flue-cured tobacco.