A new column extraction chromatographic method with p507 as stationary phase, silicon-treated porous silica-gel bead as carrier and dilute hydrochloric acid as a mobile phase is suggested for the separation of cerium from minerals arid rocks. By using oxalic acid, sodium pyrophosphate and phosphoric acid as masking agents, for other elements cerium were determined with chlorophos- phonazo-mN. More than twenty kinds of foreign ions of 5 mg do not interfere in the determination.