Abstract: The experiment of subsoiling in the growth of summer corn showed that subsoiling at 120 cm interval, comparares with 60 cm interval, could increase plant height, stem diameter, number of root layers, nodes, outspread leaves, leaf area index, and reduce height of spike. In term of deep cultivation, subsoiling had some certain negative effects on plant growth in the jointing stage, especially the depth of 20 cm cultivation reduce plant height, nodes, spread leaves and leaf area index in comparation with contrast treatment, so the combination of 120 cm interval and 30 cm depth improved leaf area index, plant height, nodes, stem diameter and reducedd height of spike, was 30cm at 120 interval during the period of 5 leaves could improve leaf area index, and increase plant height, nodes, plant stem diameter, soil water store and reduce the height of spike, and increased yield and WUE by 8.86%, 6.59%, respectively, comparaed with non-subsoiling treatment.