Connecting device of fabricated steel structure

The problem that an assembly type steel structure is unstable due to the fact that a gap exists between an inner wall plate and a steel beam is solved. The utility model provides a connecting device of a fabricated steel structure, which comprises a floor slab, a steel beam and an inner wall plate, a connecting layer is arranged between the steel beam and the inner wall plate, the connecting layerconsists of one or more groups of first connecting plates and second connecting plates, and the first connecting plates and the second connecting plates are wedge-shaped. In the specific use process,the steel beam is supported below a floor slab, the first connecting plate and the second connecting plate are connected in a matched mode, and the first connecting plate is fixedly connected with the inner wall plate through the threaded assembly; when a worker assembles an inner wall of a building such as a house or an office building, and the height of the inner wall plate is lower than the height of a building floor,