In this review, we summarize recent researches on the effects of agricultural practices on the abundance and biodiversity of arthropod soil fauna with special reference to spiders. This article examines the detrimental effects of such of these practices intensification and considers agriculture practices which aim to protect soil fauna from decline. Modern agricultural practices, including tillage and intensive use of conventional insecticides, have been broadly linked to the declines in biodiversity in agro-ecosystems. The organic farming, soil solarization, intercropping, poly-culture, mono-culture, crop rotation and fertilizer, are also discussed. Biodiversity refers to diversity of genera ,species and ecosystems. Also we discuss the best way to apply sustainable agriculture which increase population density of soil fauna and conserve biodiversity.