Anti-seismic support screw stiffening device

The utility model discloses an anti-seismic support screw stiffening device which comprises a C-shaped steel channel, a pressing block and a jacking bolt, fixing holes which are symmetrically distributed are formed in the C-shaped steel channel, one side of the C-shaped steel channel is in contact with the pressing block, two sliding grooves which are symmetrically distributed are formed in the pressing block, first reset springs are welded to the inner sides of the sliding grooves, and second reset springs are welded to the inner sides of the sliding grooves. A sleeve pressing rod is welded to one end of the first reset spring and arranged on the inner wall of the sliding groove in a sliding and sleeving mode. The top pressure bolt is rotated, so that the fixed rotating block also rotates in the positioning piece, the top pressure bolt is sleeved with the pressing block in a threaded mode, so that the top pressure bolt and the fixed pressing piece descend along with the top pressure bolt, a screw is extruded