Ion chromatography was applied to determining 10 water-soluble anions including F_-, CN_-,BrO_3-, Cl_-, NO_2-, Br_-, NO_3-, PO_43-, SO_42- and C₂O_42- in soil with ultrasonic extraction. The anions in the samples were extracted by water, and the conditions of extraction were optimized and given as follow: solid-liquid ratio of 1:10, temperature of 30 ℃, and ultrasonic oscillation time of 30 min. The filtrate that obtained from filtrating supernatant with the filter membrane of 0.22 μm was determined after the extract was centrifuged firstly. Under the optimal conditions of ion chromatography, the detection limits of the ten anions were found in the range of 0.009 7-0.31 mg/kg, the recoveries of different anions were in the range of 84.0%-112%, and the RSDs (n = 7) were in the range of 0.09%-4.3%.