Building quakeproof steel structure

The invention discloses a building quakeproof steel structure which comprises a supporting bottom plate, at least four supporting beam columns, shock absorption bodies, at least four supporting cross beams and an upper beam plate, the supporting beam columns are vertically installed on the supporting bottom plate, the shock absorption bodies are arranged at the tops of the supporting beam columns respectively, and supporting plates and shock absorption units are arranged on the shock absorption bodies. The supporting cross beams are sequentially connected to form an upper frame, the supporting cross beams are installed on the supporting plates, damping is provided for the supporting cross beams through the damping units, and the upper beam plates are laid on the upper frame. Vibration borne by the supporting cross beam can be reduced, noise generated by vibration can be reduced, the situation that a steel structure deforms due to the fact that the amplitude of vibration borne by the steel structure is too lar