There are some types of the paleosols in the hilly regions of Beijing. The seven layers of the paleosols is embedded in the loess section of Xihulin, which located in the second terrace of qshuihe River. According to the character of configuration and microconfiguration, the paleosols may be divided into the brown earth, carbonate drab soil, drab soil and leached drab soil. The research of its geo-chemical characteristics of elements revealed that there are marked differences for contents of CaO, Na₂OAl₂O₃, Fe₂O₃, SiO₂ and etc, among the paleosols and between the paleosols and the genetic units, the similar conclusion is observed from the research of the soil magnetic character. By means of comparing with other loess section, paleomagnetic studies and spore-pollen analysis, age is ensured. The different types of paleosols are formed during varied geologic period and are largely attributable to bia-climatic conditions, therefore paleosols indicated that the bio-climate had undergone 14 times replacement from warm to cold in the region of Beijing, as well North China, from 500 thousand to 10 thousand ago.