Fabricated building beam structure

The utility model discloses an assembly type building beam structure which comprises a beam body and a framework body buried in the length direction of the beam body, and the framework body comprises a first framework end plate close to one end of the beam body and a second framework end plate close to the other end of the beam body. A spiral framework reinforcing steel bar which is of a spring-shaped structure is arranged between the second framework end plate and the first framework end plate, one end of the spiral framework reinforcing steel bar is connected with the first framework end plate, and the other end of the spiral framework reinforcing steel bar is connected with the second framework end plate; one end of the supporting framework steel bar is connected to the first framework end plate, and the other end of the supporting framework steel bar is connected to the second framework end plate. The building beam structure has the advantages of being high in structural strength and bearing capacity, cap