Abstract: Studies on the diversity of soil animal community in different habitats of Leymus chinensis grassland show that the better the habitat condition, the higher the diversity index of soil animals and the richer the species. The diversity of soil animal community was positively related with the contents of soil organic matter and total N, and negatively related with soil pHvalue, but not significantly related with the contents of soil water and total P. It was decreased with increasing soil depth, and had an obvious surface aggregation.

Key words: Leymus chinensis grassland, Soil animals, Community, Diversity, tree seedling, spatial pattern, interspecific spatial association