Abstract:The pile-fermentation conditions of burdock tea were explored in this article.The effect of the fermentation content，moisture content，temperature，time and inoculum on the fermentation technology was studied，based on the soluble sugar and total flavonoids as characteristic indexes.Furthermore，the optimal fermentation process was determined by single factor and orthogonal optimization test.The optimum fermentation conditions were as follows：the fermentation content was 1 000 g，water content was 40%，the temperature was 60℃，inoculum was 3.5%，and pile-fermentation time was 21 d.The influence of four factors on the comprehensive score in the orthogonal test was as follows：moisture content＞temperature＞inoculum ＞ time.