In this work,typical soil profiles developed from early Paleozoic stratum in Daba Mountains were selected as our investigative objects.The concentrations and distributions of Se and F in those soils were studied.It was found that the concentrations of Se and F in soil of Daba Mountains were far higher than those in control soils and those of background value in Chinese soils.The average Se and F concentrations in Daba Mountains soils are 6.65±14.25 μg g^-1 and 670±451 μg g^-1,respectively.Zn in abundance and Fe-deficiency help to enrichment of Se and F in the soils.Se and F concentrations in soils are governed by the distribution of stratum and the lithology of parent rock.Otherwise,environmental geochemical processes,biologic processes and denudation physiognomy also profoundly affect the redistribution of them in soils.