Assembled rotating steel stair structure and assembling method thereof

The invention relates to the technical field of buildings, in particular to an assembled rotating steel stair structure and an assembling method thereof.The assembled rotating steel stair structure comprises a rotating stair body, the inner end of the rotating stair body is fixed to a mounting stand column, and the mounting stand column is fixed to a mounting base; an outer handrail frame is fixed to the outer end of the spiral stair body, and a walking channel is formed among the outer handrail frame, the spiral stair body and the installation stand column. The outer armrest frame is movably connected with a rotary lifting mechanism, the rotary lifting mechanism is connected with a power mechanism mounted on the outer armrest frame, and the rotary lifting mechanism can be driven by the power mechanism to do spiral lifting motion along the outer armrest frame. The rotary lifting mechanism is connected to the outer armrest frame in a matched mode, the rotary lifting mechanism can be controlled to conduct spira