Abstract: Diversity of soil animals community in Xiao Hinggan Mountains has been studied in six different habitats of Pinus koraiensis and broad-leaved mixed forest, secondary birch forest, spruce-fir and Pinus koraiensis forest, Larix gmelini forest, spruce-firforest and Alnus hirsuta forest respectively. The results show that the dominant group of large-size soil animals is Enchytraeidae belonging to Oligochaeta. And it is identical with that in Hokkaido, Japan. But it is different from that in Tianmu Mountains, Hengshan Mountain and Yuelu Mountain belonging to subtropics, and Xiaolong Mountain belonging to warm temperate zone. The dominant groups of middle-small-size soil animals are Acarid and Collembola. And they are similar to those in Japan and other zones in China. The diversity not only of large-sized soil animals but also of middle-small-sized soil animals is higher in the habitat of Pinus koraiensis and broad-leaved mixed forest. The habitat conditions of Pinus koraiensis and broad-leaved mixed forest are superior to the other five habitats. The correlation between the diversity of soil animals community and richness and evenness uniformity is positive, but the correlation between the diversity of soil animal community and dominance is negative, and between the diversity of soil animal community and individual numbers is not direct. The comparability indexes of different habitats are all high. It is shown that the diversities of soil animals in 6 habitats have differences but also have comparability. The distribution of vertical diversity of soil animals is all surface gathering and decreasing with the increase of soil layer depth, but the velocity is different. The surface gathering of middle-small-sized soil animals is obvious.