In order to reveal the differences of ecological environment, and the effects on the fauna composition. Five representative regions were selected in cultivated meadow soil regions of different latitude in Sonnen Plain. A total of 2088 individuals and 33 groups of macro soil animals, a total of 8372 individuals and 22 groups mid-micro soil animals were captured in May, August and October in 2009, which belong to 4 phylum, 7 classes, 19 orders and 33 families. The results showed that: individuals and groups of the soil animals varied greatly in horizontal distribution of different regions. Individuals and groups of the soil animals were dominant in Hulan, and the least in Nenjiang. The vertical distribution showed that soil animals mainly did not live in the surface soil layer, compared with those lived in forest soil. The analysis showed that: the DG index of the soil animals varied in different regions. The DG index of macro-soil animals was Hulan>Hailun>Suihua>Yi’an>Nenjiang, and that of mid-micro soil animals was Hulan>Hailun>Suihua>Nenjiang>Yi’an.