In the exploration of financial enabling agricultural industrial development, the “trinity” comprehensive cooperation of production cooperation, supply and marketing cooperation, and credit cooperation, with the agricultural industry organization as the leading force and all-round financial support, has been formed. The “trinity” comprehensive cooperation is the result of the interaction between the social system structure and the cognition and practice of actors. The external legal rules, policy systems, and other institutional elements and the internal technical requirements of economic efficiency, social network, imitation and innovation have jointly shaped the generation path, evolution space and organizational boundaries of the “trinity” comprehensive cooperation, as well as the difficulties to be overcome in the development of practice. In the new era, the development of the “trinity” comprehensive cooperation requires creating a good external environment, constructing a close connection mechanism between different agricultural business service entities, enhancing the ability level of agricultural business service entities, promoting the gathering of agricultural service resources, better leading the organic connection between small farmers’ production and modern agricultural development, and better serving the construction of a powerful agricultural nation.