In order to probe into the range of distribution of the adventageous species of Fujian Betula luminfera community and discuss their inferrelation of niche factors, in this paper, the niche breadth, niche overlap and niche departure of Weiming Betula luminifera community’s eight main simpsons were determined. The result shows that the niche breadth of the advantageous species of the community is generally wide which therioetically belongs to wide_niche breadth, Moreover, the competence among the advantageous spieces is fairly severe. If there are no human measurements, the present situation of the transient mutual share of resources and peaceful exsistence of the main simpsons will be hard to be maintained.