Abstract: Experiment on the returning of green manure milk vetch and fertilizer reduction in early and middle-season rice. The results showed that after planting milk vetch and turning over in situ, the application of fertilizer in early and middle-season rice in the following season could be reduced by 20%. The yield of rice increased to a very significant level. the economic benefit was remarkable, increasing by 147.7 yuan per 667 m². The reduction of fertilizer in early and middle-season rice in the post-season after turning over of milk vetch had the effect of increasing yield and income.