Abstract: 1.In the paper the histories and current situations of the floristic regionalization have been reviewed. The general mothod is perceptual analysis, that the same flora such as Taiw an is belonged to the different Kingdom sometimes (Good, 1974; Takhtajan, 1978; Wu, 1979; Wu & Wang, 1983)that the mathem atical (or numerical)methods apply the inforamational capacities which are very little and simple. 2.Because any flora is an organic entity of the dialectical unity which is the mutual contact and difference, mutual consecution and inconsecution, we can use method of fuzzy mathenatics with the help of the computer to divide the floras. 3.This pa-per determines 7 quantitative degrees, which are the floristic abundance, acientness and growth of speciation, the complex and endemicity of floristic elements, the vegetation -type and ecological geography, for the floristic regionalization by the method of fuzzy mathematics to study the floristic regionalization 4.Through the study of Fanjingshan Mountain, "Hundred Li Rhododendron" Forest Area, Kuankuoshui Nature Reserve, Maolan Krast Forest Area, Leigongshan Mountain, Yuanmou Dry -hot River Valley Miaoershan Mountain and Dabieshan Mountain and so forth 8 floras for example, the results of the floristic regionalization by the method fo fuzzy mathematics show that this method not only studies the floristic regionalization but also show clearly the grades every chorias, that it and classical study are the same.

Key words: Quantitaltive floristics, Floristic regionalization, Fuzzy mathematics