Low-impact multi-section-action connecting thrust device

The invention provides a low-impact multi-section-action connecting thrust device in a strong-connection, weak-push-impact and low-impact environment. The low-impact multi-section-action connecting thrust device comprises a stepped shell, a middle push rod, a connecting disc, an unlocking push disc, an energy-absorbing buffer ring, a middle-section connecting bolt, an adapter screw sleeve, an energy-absorbing buffer disc, a head end connecting screw and an actuating air source pipe. The actuating air source pipe is connected with one end of the step shell, the other end of the step shell is installed in a port in one end of the connecting disc, and the unlocking push disc is tightly pressed in an inner cavity of the connecting disc through the front end face. The middle push rod is installed in the step shell and the unlocking push disc to form a sliding pair, and the large end of the middle push rod is provided with a vent hole. One end of the middle-section connecting bolt is installed in a blind hole in th