Abstract: Based on the detailed subzone division for Kujiertai and Wukuerqi uranium deposits，this paper studies the migration regularities of major elements in various subzones of interstratified oxidized zone．Some major elements including SiO2 and A1203 appear relatively active during the interstratified oxidation．However．such phenomenon has not been traced enough previously in literature．Si has a migration out behavior and its contents in the host rocks regularly decrease with intensifying oxidation．On the contrary，the Al contents regularly increase with intensifying oxidation．The relationship between Si and A1 shows that different Si02／A1203 ratios can indicate if the interstratified oxidized zone is ore-bearing or ore-barren