The failure to achieve common prosperity of farmers is the biggest weakness and bottleneck of China’s pursuit of common prosperity at present and in the future.In the background of knowledge economy society，education is the fundamental way to transform and optimize farmers and realize their common prosperity.Historically，the United States has set up land grant colleges in various states across the country to carry out agricultural industrialization education for farmers，realizing the multiple wins of universities，agriculture，farmers，governments and other entities.At present，there are many problems in the pursuit of farmers’common prosperity through education classification，such as lack of effective attention to the source of most farmers，placing farmers’ education at the lowest level in the classification，using more informal forms of education，focusing on the immediate gains and ignoring the long-term quality of education，and overemphasizing primary agricultural products.Facing the modernization of agriculture，rural area and farmers and the construction of powerful country，China’s educational classification promoting the common prosperity of farmers urgently needs a series of promotion mechanisms to cultivate new farmers，foster migrant workers，make farmers’ children happy，promote farmers’ returning to their hometown，and speed up farmers’ renewal，with the combination of internal and external education classification and unification of remoulding，upgrading，and transformation cycling.To promote operating of the five series of mechanisms，China needs to legislate to endow higher education with the educational classification function of transforming farmers，establish an educational classification system with undergraduate education as the main body to promote farmers’common prosperity，and implement supporting educational reform and policy guarantee.