Connecting joint of dry-type connected prefabricated beam column and construction method

The invention discloses a dry bolt connected prefabricated beam-column connecting joint and a construction method. The dry bolt connected prefabricated beam-column connecting joint comprises a prefabricated column and at least one prefabricated beam; a bracket is arranged on at least one side of the prefabricated column; the prefabricated beam is lapped on the bracket through a tongue-and-groove;a metal connecting piece with a notch is anchored in the position, at the tongue-and-groove, on the precast beam; and through a bolt, the metal connecting piece is connected with a first connecting piece pre-embedded in the bracket. Prefabricated beam columns are connected through bolts on the metal connecting pieces and threaded sleeves pre-buried in the prefabricated columns, gaps between the beam columns and beam bottom notches are filled with grouting materials, beam upper steel bars and floor slabs are arranged, cast-in-place concrete is poured on a prefabricated beam and slab composite layer, and therefore, a wh