Mentougou District which is located in the West Mountains of Beijing, is the main quarrying area to satisfy the big demands of urban construction in Beijing. Quarrying has altered the landscape of Beijing West Mountains and resulted in the habitat degradation dramatically. Soil animals as the important part of the Earth′s biological diversity play vital roles in decomposition, soil-plant ecosystem restoration, and even as indicators for ecological restorations. In order to study on the community diversity of ground dwelling soil animals in abandoned quarry areas, one transect with pitfall traps was set up in an abandoned quarry in Mentougou during March to April of 2006. The transect was across the quarry（down side）which was under natural restoration within 10 years and then up to the surrounding area (upper side) where was planted with Platycladus orientalis in the natural shrubwood. 2 604 individuals（112 unknown）of soil animals were collected from 157 pitfalls, which belonged to 4 classes, 16 orders and 1 suborders, and 47 families. Among the macro ground dwelling soil animals, the most common groups were cicadellidae (22.45%) and Formicidae (47.71%), then were common groups such as Tenebrionidae, Mycetophagidae, Scaphidiidae, Lathridiidae, Cicadidae, Thripidae, Armadillidiidae and Araneae. The most common meso and micro ground dwelling soil animals were Isotomidae (23.27%), Entomobryidae (35.22%), and Oribatida (41.01%). Phytophage was the most common guild (41.51%), then was predators (28.30%) and Omnivores (18.87%). Fungivorous forms (1.89%) and Cadavericoles (1.89%) were the rarest guilds.
The result by Spearman ranks correlation stated that the difference of individual numbers of ground dwelling soil animals between down side and upper side was very significant（r_s=0.446, p<0.01）. In the down side, the individual number and group richness were increasing from March 31 to April 21, and the group diversity and evenness were increasing from March 26 to April 21 while the group diversity and evenness in upper side were decreasing. The difference of group richness and group diversity between the down side and the upper side were significant（p<0.05）. The analysis by No-metric MDS （Non-matric Multidimentional Scaling）stated that the distribution of individual number, groups and guilds related to the situation of restoration, soil nutrient and vegetation.