Abstract: In order to explore the reduced amount of chemical fertilizer in rice production after milk vetch was incorporated into the paddy field. A test on reducing the fertilizer amount applied to paddy rice combining with fresh milk vetch grass returned to the field was carried out, and the results showed that the turning amount of 1 500 kg/667 m² of milk vetch could increase the content of soil organic matter, improve the physical and chemical properties of soil, increase the content of nitrogen, phosphorus, and potassium of soil, and reduce chemical fertilizer application of the following early rice by 20% to 30%.