Hexavalentchromium(Cr 6+)is one of the importantsoil pollutants，and it is of great significance to study the determination methods of low concentration hexavalent chromium in soil for soil census. Using alkaline sodium carbonate as theextractant，hexavalent chromium in soil was extracted by constant temperature water bath oscillation at 92℃. The extraction solution wastreated by ion exchange to reduce matrixinterference，and Cr 6+(52Cr)in the extraction solution was determined using an inductively coupled plasma mass spectrometry with He collisionmode，with 72Ge as the internal standard element. The results showed that the detection limit of the method was 0.06 mg/kg. The certified reference materials were analyzed to test the method. The determined values werein good agreement with the certified values. The standarddeviations(RSD)of the method were1.16%-5.40%(n=5). The method israpid，accurate，and suitable for the determination of low content and large batch of hexavalent chromium in soil.