Abstract: Soil quality is currently on the issues and is the key of land consolidation. This paper studies on soil quality of plain land consolidation projects in Tai'an and quantitatively evaluates soil quality. Sampling plots of K1, K2 and K3 were determined by GPS which are the blocks after finishing land consolidation for one year, two years and four years. Through chemical analysis in laboratory, the attribute data of sampling plots were accessed. In accordance with the characteristics of the studied area, available nutrients, organic matter, pH, conductivity and soil bulk density were taken as the basic evaluation factors. Under the Arcgis we use Kriging interpolation method to form a composite indicators distribution map and a soil quality grade map. The results show that: distribution of nutrients in the block after accomplishment of land consolidation for four years is the most uneven. Soil quality has been obviously improved than that of the blocks after finishing land consolidation for one year and two years and I, II, III grade is 56.77% of the entire block area.