Thin-bottom groove type prestressed concrete superposed beam

The invention discloses a thin-bottom groove type prestressed concrete superposed beam. The concrete superposed beam comprises a concrete side wall, a concrete thin bottom, prestressed longitudinal steel bars, a plurality of stirrups and common steel bars, and the stirrups are equidistantly arranged along the same straight line. In the production process, the operation process is simple and convenient, and factory-like manufacturing is easy to achieve; in the on-site construction process, the common steel bars are laid on the concrete thin bottom and anchored into a column or a beam according to the anti-seismic specification, then upper longitudinal bars are laid and anchored into the column, and finally the upper longitudinal bars, plates and the column can be connected into a whole in a cast-in-place mode, so that joint stress of the later-laid steel bars and a prefabricated part can be achieved; and the problems that a traditional fabricated building joint is poor in performance, beam column reinforcing s