Prefabricated building main body structure

The utility model discloses an assembly type building main body structure which comprises a foundation, a prefabricated column and a prefabricated beam, the foundation comprises a reinforcement cage, the reinforcement cage is composed of four facade steel bars and bottom plane steel bars, a first metal plate is installed on the bottom plane of the reinforcement cage, and the bottom of the prefabricated column is installed on the first metal plate through a vertical stress connecting piece. The lower part of the prefabricated column is fixedly connected with the reinforcement cage through a transverse stress connecting piece; the end part of the prefabricated beam and the top of the prefabricated column are assembled and connected through a node connecting piece; the connection joints of the foundation and the prefabricated columns and the connection joints of the prefabricated columns and the prefabricated beams are connected into single structures through concrete pouring, and all the single structures are c