Concept: Straw returning to the field is to directly crush and scatter the crop straw upright after ear picking with the straw returning machine matched with the large and medium-sized tractors on the surface, then plough it into the soil and decompose it to make base fertilizer. Compared with the traditional planting method, it saves many processes such as cutting, bundling, transporting, chopping, retting, turning, delivering and scattering. Advantages: Improving labor efficiency can reduce the labor intensity of farmers, time saving investment, increase the content of soil organic substance, reduce soil erosion, increase the capacity of water storage and moisture storage, eliminate diseases and insect pests, and increase grain yield. Specs. : Model 4JQ - 90 (Cutting/Chopping range: 90cm), 100, 120, 130, 140, 150, 165, 180, 200, 220, 250, 260, 300, 330, 360.