Fastening connection tool for steel structure engineering

The fastening connection tool structurally comprises a steel column, a foundation column and connecting mechanisms, the connecting mechanisms are installed in the left side and the right side of the steel column and the left side and the right side of the foundation column, and the upper end of the foundation column and the lower end of the steel column are mutually embedded and fixed. A stress rod in the barrier plate is clamped in the side surfaces of the steel column and the foundation column, so that the nut is compressed by the elastic force of an elastic plate under the screw thread rotation fastening of the nut, and the stress rod can share the blocking of the metal plate when the steel column is subjected to inclination force, so that the metal plate is prevented from being easily broken due to overlarge blocking stress, and the service life of the metal plate is prolonged. The lower end of the steel column slides into the concave groove from the guide plate, a supporting effect is generated on the tw