Method and device for reversely installing bolt of tubular member

The invention relates to a method and a device for reversely installing a bolt of a tubular member. The method comprises the following steps of: (1) drilling a bolt hole and an auxiliary installing hole; (2) tying a guide head with one end of a traction rope, throwing the guide head into the tubular member from the bolt hole, and leaving the other end of the traction rope outside the bolt hole; (3) fixing one magnet at the elbow end of a bent rod, and stretching the elbow end into the tubular member from the auxiliary installing hole; (4) shifting the bent rod so that the magnet attracts the guide head and drives the guide head to drill out of the auxiliary installing hole; (5) connecting the guide head with the screw end of the bolt, and throwing the guide head into the tubular member from the auxiliary installing hole; (6) dragging the other end of the traction rope to drag the guide head and the screw end of the bolt out of the bolt hole; and (7) removing guide tooling, tightening a nut on a bolt rod, and