Self-anchored spheroidal graphite tube mounting tool

The utility model discloses a self-anchored spheroidal graphite tube installation tool which comprises a cylinder body, a first check block is fixed at one end of the cylinder body, a first screw rod which is matched with the first check block through a thread structure and penetrates into the cylinder body is arranged on the first check block, and a pushing shaft which slides along the inner wall of the cylinder body is arranged in the cylinder body. The end, away from the first check block, of the pushing shaft extends out of the barrel and is fixedly connected with a pushing arm perpendicular to the pushing shaft, and two parallel clamping arms are fixed to the side face of the barrel. According to the utility model, the first screw rod can be rotated through a smaller torque, and the push shaft drives the push arm to push the stop block; and after the check block is mounted once, the first screw rod can be quickly rotated to push the push arm to restore to the original position, so that the use is very co