Abstract: Science and Technology Backyard is a new mode of close combination of “industry, university, research and application” , a new measure to accurately serve the development of “agriculture, rural areas and farmers” , and it has played a prominent role in agricultural technology innovation, agricultural technology personnel training, agricultural technology promotion and so on. Using the method of multi case study, this paper combed the characteristics and effectiveness of the operation of Science and Technology Backyard, discussed the factors that restrict its development and proposed suggestions conducive to its future development. The results showed that the development of Science and Technology Backyard is restricted by the lack of policy guidance and legal guarantee, the low efficiency of its construction and the knowledge gap between farmers and agricultural extension personnel. Thus, it is suggested to perfect the policies of Science and Technology Backyard, improve the construction efficiency of Science and Technology Backyard and narrow the knowledge gap between farmers and agricultural extension personnel. In order to provide theoretical guidance for the construction of agricultural innovation system, the reform of agricultural scientific research system and agricultural science and technology extension services, and better serve the rural revitalization.