Geostatistics combined with GIS was applied to treatment and analyze the spatial variability of soil nutrients in topsoil(0~20 cm) in blacksoil crop area with different scales.The results indicated that the semivariogram of organic matter content and available nitrogen were best described by Gaussian model in large scale;The semivariogram of OMC was fited by sphericity model;the AN was best fitted by exponential model in small scale;and available phosphorus was best fitted by linear model in both scales.CV of AP was changed bigest of all nutrents.The analysis also showed that the spatial auto-correlations of soil nutrients are very different in different scales,which indicated the change was impacted by different ecological process.