The effects of rational planting, the paddy upland system, rotational tillage and mulching corn straws on physical and chemical characteristics of soil with high content sands of plain area were studied. The results showed that the system of "twice upland aod one paddy, five times cereal cropping system in two years" could not only raise crop production, but also improve the physical and chemical properties of soil. The paddy upland system increased clay dispersion content and soil fertility. The rotation tillage, minimum tillage and non tillage practices were beneficial to improve soil fertility, increase soil properties and save man power. The mulching corn straws had very significant profit on raising soil fertility and crop yield. The experiment and its application were successful and may support a virtuous cycle of eco agriculture.