Abstract: The Fuzzy mathematic analysis of soil enzyme activities from 8 kinds of forest in Tiantai mountain indicate that the similar sequence of the net level of enzymatic activities from the different soil environments was: Rhododendron fortunei soilPinus taiwanensis soilTea plantation soilBamboo soilPseudolarix amabilis soilChamaecyparis pisifera soilCryptomeria fortunei soil Heptacodium miconioides soil. There existed different relationships among the enzymes and between enzymes and soil environmental factors. The Factor analysis revealed the important factors governing the synthetic effect of soils. These important factors were 7 kinds of soil enzyme, soil microbial numbers, soil net respiration rate and soil gross organic matter.