Abstract: x²-test and interspecific association coefficients formulate are used to determine the interspecific association and correlation among 19 dominant species of Castanopsis carlessii community in Wuyi mountains． The results indicate that the overall association among 19 dominant species in Castanopsis carlessii community are irrelevant，the positive quality of each species-pair is not significant，but the negative qualities of some species-pair are significant．These indicate that the community is not mature，and is in the phase of succession．