Abstract: Three white birch trees growing at shuangling Forei Farm in Heilongjiang province were selected to determine the contents of 8 chemical elements both in the 1995′s growth rings, C(Z、t), and in the soils near the roots, C′(Z,t), of the trees. The results showed that the relationship between C(Z,t) and C′(Z,t) followed the logarithmic linear correlation model, lgC′(Z,t)=a（Z）＋b（Z）lgC（Z，t）．Where Z is the atomic number of element, and the year when the tree ring grows. Based on this model the chronosequences of chemical element contents in the soils were reproduced from those in the tree rings; i. e., the dynamic variations in the chemical element contents of the soils at the sites were traced. In this study the chronosequences of the chemical elements including k, Mn, Cu, Zn, Sr, Cd, Ba and Pb in the soils near the roots of white birch trees from 1954 to 1995 were established, and the background values of K, Mn, Cu, Zn, Sr, Cd, Ba and Pb in the soil were calculated by taking the lowest values of the chronosequences of the element contents as upper limits of the background values.