Abstract: Through comparative analysis, this study found that the overall effect of chemical fertilizer and pesticide reduction was obvious, and the effect of chemical fertilizer and pesticide reduction of crops was also obvious, but the effect of chemical fertilizer and pesticide reduction of food crops was not ideal. Based on the perspective of rural population aging, this study analyzed the dilemma of grain green production, and analyzed the reasons why the input of chemical fertilizer and pesticide increased instead of decreasing in grain production, and finally put forward some suggestions to promote the reduction of chemical fertilizer and pesticide and help the grain green production.

Key words: rural population aging, grain green production, negative growth of chemical fertilizer and pesticide