Abstract: To investigate the distribution and enrichment of selenium in the soils of Ninghua County, Fujian Province, we have conducted a multi-purpose regional geochemical survey by systematically collecting a total of 621 surface soil composite samples and 158 deep soil composite samples, which were used to study the geochemical characteristics and influencing factors of soil selenium. The results showed that the selenium content in surface soil range from 0.09 to 1.05 mg/kg with an average of 0.21 mg/kg, while in deep soil it range from 0.09 to 0.61 mg/kg with an average of 0.24 mg/kg. The highest selenium content was found in the soils derived from the Dongkengkou Formation（∈₄d） of the Late Cambrian and the Xixi Formation（Zx） of the Sinian, with averages of 0.47 mg/kg and 0.40 mg/kg respectively. The surface soils are generally selenium-rich and selenium-sufficient, with a selenium-rich soil area of 283.20km², accounting for 11.76%. The average selenium content in different soil types are characterized as yellow soil>red soil>paddy soil>purple soil. In some areas, the selenium content in surface soil showed a more significant enrichment than that in deep soil, and the intensely enriched areas basically coincided with the selenium-rich soil areas, indicating the potential for developing selenium-rich agricultural products. Correlation analysis show that the selenium content in soil has significantly positive correlation with organic carbon, total iron oxide and manganese, and apparently negative correlation with pH, indicating that the physicochemical properties of soil and iron-manganese oxides have an important impact on the surficial geochemical behavior of selenium.