In order to study the impact of the soil organic carbon content and soil organic carbon heterogeneity on the sorption behavior of trichloroethylene (TCE), the authors collected 7 soil samples including 3 surface soil samples of Beijing urban area and 4 soil standard reference samples. These 7 samples were treated by using H2O2 to remove the lower aggregate carbons (LAC). Both treated and untreated soil samples were used to carry out statistic batch tests on the TCE isotherm sorption patterns. The results show that the isotherm adsorption patterns fit the liner sorption model very well both for the treated and untreated soil samples. The removal of LAC did not change the sorption model type, and only changed the parameters of the liner formulae. The residual organic carbon content of all the samples remained higher than 0.1%, and the organic carbons still played the main role during the sorption. The results also show that there exist no apparent relationships between the soil sample sorption capabilities and different kinds of organiccarbon content, i.e., the total organic carbon (TOC) content and the higher aggregate carbon (HAC) content and LAC content， and the total sorption capabilities of 7 originalsoil samples used in these tests are mainly determined by the LAC sorption capabilities. These data have confirmed the fact that TOC, LAC and HAC all have obvious heterogeneities, i.e., the same soil organic carbon content will have different sorption capabilities. The difference in organic carbon construction and components is the key factor affecting the sorption behavior. Unless the difference in organic carbon construction and components is negligible, the organic carbon content will play an important role in affecting the TCE sorption behavior. However, the heterogeneities of soil organic carbons are mainly caused by the difference in mineralization and humification.