Pentachlorophenol（PCP）was widely used. It is, unfortunately, also very widely detected in soil and sediment in the countries where it has been used. Moreover, PCP residue in soil can be accumulated in organisms through the food chains and then menace human health. This article is mainly to review the adsorption mechanism, chemical degradation, biodegradation and their influencing factors, as well as bioaccumulation and the ecotoxicological mechanism and effect of PCP in soil ecosystem. And then the new trend of study on environmental behaviors of PCP in soil ecosystem is presented.