Abstract:The niche differentiation of 7 main species in oasis-desert ecotone in Fukang of Xinjiang was analyzed quantitatively with respect to community gradients and single ecological factor gradients, i.e. soil moisture, soil salinity and soil acidity, by Levins formula and the method by Wang gang. The results were as follows: (1) according to community gradients, the order of niche breadth was Reaumuria soongorica(0.7010), Haloxylon ammodendron(0.6434), Ceratocarpus arenarius(0.4774), Bassia dasyphylla(0.3745), ...