With the support of National Social Science Fund Project on the issue of agriculture, rural areas and farmers, related researches have been developing rapidly and the results are outstanding. This overall analysis helps us to summarize previous research experience and to further deepen related issues. The paper took 3375 projects of National Social Science Fund and its 18770 papers as research object. Through an econometric analysis on project information, research papers, research hotspots and related evaluation, the development and research situation of China's "three rural" problems in the past 20 years were presented. The results showed that the farmers, the new generation of migrant workers and the new countryside were the research hotspot, and the papers on farmers and migrant workers were most frequently cited.