The invention provides a method for improving soil quality and crop yield in wheat/maize rotation. The soil porosity, field water holding capacity and organic matter content can be effectively improved by alternate use of different crop rotation modes. According to the method, a preferred crop rotation mode, which is no-tillage, deep scarification, no-tillage and turning over, is screened out. Inaddition, by adoption of 50% benzothiostrobin and quinoline copper suspension agents for treatment of crop seeds, soil-borne diseases can be effectively prevented, the crop yields are improved, and the agents have a synergistic effect.