Soil plays an important role in highlighting the aroma style of tobacco leaves. Soil series is lowest classification unit of soil taxonomy and is the holographic ID Card of soil. Yunan is the most important tobacco-planting province which represent the fresh scent style of flue-cured tobacco. This paper took Jiangchuan and Nanjian of Yunnan as the study region, selected totally 16 typical tobacco fields which could grow the tobacco leaves of the highest-quality and tried to establish preliminarily the relevant soil series. The studied 16 typical tobacco field soils could be classified into 4 orders, 4 suborders (Stagnic Anthrosols, Ferrosols, Argosols, Primosols), 8 groups and 8 subgroups, could be defined as 12 families and 15 series. Generally, the fresh-scent style of Yunan flue-cured tobacco could be preliminarily attributed to low latitudes, high elevation, semi-arid climate, high content of free iron oxide in soil etc. Moreover, the tobacco fields of Yunan were generally clayey which need to be improved to intensify the fresh-scent style of tobacco.