Abstract: The purposes are to provide a basis for precise fertilization, waste reduction, salt content decrease in soil and crop rotation. The field samples, GPS positions, statistical analysis and space analysis methods were used in this study. Correlation analysis between organic matter and salinity in cultivated soil was studied based on the SPSS17.0 and ArcGIS 9+ software. The results showed that: (1) the average content of organic matters in melon planting soil was higher than that in maize and cotton planting soil; (2) the differences of variation coefficients in different layers of different cultivated soil were obvious, the organic matters and salt ions had different degrees of correlated characters, the organic matter and K++ Na+, Mg2+ salt ions showed significantly positive correlations in cotton planting soil, and the others had significantly negative correlations; the organic matters and CI-, Mg2+ salt ions had significantly positive correlations in melon planting soil, and the others had significantly negative correlations; the organic matters and SO42-, K++ Na+, Mg2+ salt ions showed significantly positive correlations in maize planting soil, and the others showed significantly negative correlations; (3) the content of salt in cotton planting soil gradually increased from surface to bottom; the content of salt in the surface layer of melon planting soil was high, while the contents of salt in the middle and bottom layers had no difference, the content of salt in maize planting soil had first increasing and then decreasing trend.