Abstract: Lithium concentrate is a natural mineral grade a high grade of lithium,as well as abundant rubidium and cesium.Accurate determination of the content of these 3 elements is of great practical significance.Tetra-acid sample dissolution was used to dissolve lithium concentrate,and the content of lithium,rubidium,and cesium in lithium concentrate was determined by atomic absorption spectrometry in a dilute nitric acid medium.This method has high accuracy and good precision,with a spike recovery rate of 98.67 %-99.67 %.The relative standard deviations of the measurement results were all less than 5 %,and they were consistent with the results obtained by the national standard method,making it suitable for industry promotion.