The soil animals are an important integral part of the soil ecosystem.They, as a medium, perform a function in the transformation, storage and release of vital nutrients in the process of material biocycles.The distribution and the number of the soil animal population of four vertical zones in the northern slope of the Changbai Shan Mountain have been presented in the paper.The content and the bio-concentration of various chemical elements in the body of soil animals have also been determined.The capacity o...