Abstract:The agricultural research institute is an important force of "multi-subject" in agricultural science and technology extension in the new era. Based on the knowledge and information system theory of agricultural extension, combined with the current situation of agriculture in Beijing, Beijing Academy of Agriculture and Forestry Sciences has formed a double "Four Pole" science and technology extension service mode with the four pole docking of "the municipality and the academy, the academy and the districts, the academy and the towns, and the academy and the enterprises (bases)" ,also with the four pole service of "comprehensive service experimental station, expert workstation, science and technology backyard, demonstration base" as the core content. It has opened up a convenient channel for scientific and technological achievements of agricultural research institutes to enter the villages and households, and provided experience and enlightenment for promoting the scientific and technological popularization of agricultural research institutes in the new period.