This study reported a new method of the Skalar SAN++ to determine soil nitrate and nitrite contents.The result showed that the correlation coefficient of the standard curve was greater than 0.999 5 when the soil NO-3-N and NO-2-N contents were determined with the Skalar SAN++.The detection limits were N 0.20 mg/kg and N 20.00 μg/kg.The added recovery rate was between 98.0%~101.8%,the relative standard deviation(RSD)was between 0.95%~2.25%,and the method had high precision and accuracy.This method used 2.0 mol/L KCl as solution agent was suitable for different soils of Jilin province.The method had a wide linear range,fast,low sample consumption,high degree of automation and determined both soil NO-3- N and NO-2-N content simultaneously.