Investigations were made of soil fauna community in relation to vegetation succession alongside roads in typical semiaridity grassland zone.It was found that when the original soil-vegetation system was completely destroyed,the soil macrofauna therein were extincted while soil meso-microfauna could be found surving in the new system because they depend less than soil macrofauna.Soil fauna increased obviously in diversity and density at the initial stage of vegetation restoration and varied from habitat to habitat at the climax stage.The difference of diversity indexes of soil fauna was not significant at the stage of vegetation climax and restoration.Coleop tera showed a trend similar to that other soil animals did in diversity index and they could be cited as indicators at different stages of vegetation restoration.The grey relevant coefficients of diversity of soil fauna community were high with soil pH value,total P,total K and soil natural moisture,suggesting that these soil factors are closely related to variation of soil fauna diversity.