介绍了有机污染物在土壤—水体系中的分配理论。该理论认为有机污染物主要被土壤有机质以非吸附的方式所吸收，所以多种污染物被同时吸收时不存在竞争作用，而且吸收量受到土壤有机质和有机污染物分子极性的影响。有机污染物在土壤有机质—水体系中的分配系数，主要与其水溶性有关。 The distribution theory of organic pollutants in soil-water system is introduced. The theory holds that organic pollutants are mainly absorbed by soil organic matter in a non-adsorptive manner. Therefore, there is no competitive effect when multiple pollutants are simultaneously absorbed, and the absorption is affected by the polarities of soil organic matter and organic pollutants. The partition coefficient of organic pollutants in soil organic matter-water system is mainly related to its water solubility.