Rapid installation tool for O-shaped sealing ring on airplane and use method

The invention belongs to the technical field of assembly, and discloses a quick mounting tool for an O-shaped sealing ring on an airplane, which is characterized in that one end of a first force application rod is rotationally connected with one end of a second force application rod, and the other ends of the two force application rods are handheld parts; each of the three mounting claws is of a long cylindrical rod structure with an external threaded rod body at the top and a knurled rod body at the bottom; rotating shafts of the two force application rods are rotating sleeves, and the external thread parts of the first mounting claws are mounted in the rotating sleeves; mounting holes are symmetrically formed in the first force application rod and the second force application rod; external thread parts of the second mounting claw and the third mounting claw are respectively mounted in the mounting holes of the first force application rod and the second force application rod; and the knurling parts of the fi