Flexible installation type steel structure stair design structure of public space decoration component

The invention discloses a public space decoration component flexible installation type steel structure stair design structure which comprises a steel structure body, decoration components and connecting pieces, the steel structure body comprises steps and outer baffles, inserting bases are arranged on the backs of the steps, inserting cavities are formed in the inserting bases, and inserting holes corresponding to the inserting cavities in position are formed in the surfaces of the outer baffles; the height of the inserting hole is smaller than that of the inserting cavity, the decoration component is inserted into the inserting base through a connecting piece, the connecting piece penetrates through the inserting hole and then extends into the inserting cavity, the connecting piece comprises a rotary knob, a transmission assembly, a driving gear and racks, the racks which are arranged in a central symmetry mode are arranged on the two sides of the driving gear, and flexible cushion blocks are arranged at the