Abstract: The concentration Clarke,the dispersion Clarke and average contents of 14 microelements:Mn,Cu,Cr,Co,Ni,Pb,Zn,Cd,V,La,Mo,Sr, Be and Ba in soils and plants of alpine tundra zone in Natural Conservation Region of the Changbai Mountain which is China’s earliest area joining in International Biosphere Conservation Network are studied.The microelement geochemical spectra of soils and plants is approached.The alpine tundra zone in the Changbai Mountain is the biological geochemistry area with high contents of Pb,La,Zn and Mo,and low content of Sr. After calculating the biological absorption coefficient of alpine tundra plants and continental plants,it is found that alpine tundra plants have a characteristic of strong absorbing most of microelements.The research on the biological absorption coefficients of 19 kinds of plants in the region shows that different plants have different absorption capacity to the same microelement,and the same plant has the different absorption intensity to microelements.Each plant has an obvious geochemistry choice for the migration and enrichment of chemical elements.And this choice is carried out in the intrinsic way under the circumstance without the strong interference of human activities.It is impossible to explain completely the biological gathering of elements with physical and chemical laws.