As the rapid industrialization and wide use of chemical fertilizers,agricultural material,more and more agricultural soils were polluted by the Cadmium(Cd).The article introduced that Cd biological toxic effects to soil microorganisms,with the Cd content increasing,the microorganisms and soil enzyme are reduced,even disappeared(1 000 mg/kg).On the basis of summarizing the existing research,it is suggested that the range of critical value(concentration)of microbial biomass by cadmium inhibition is probably 20-40 mg/kg.At the same time,the remediation technology of contaminated cadmium by microo...