Pressure maintaining cylinder tool clamp

The invention relates to the technical field of pressure maintaining cylinder machining equipment, in particular to a pressure maintaining cylinder tool clamp which comprises two semicircular hoops with one ends hinged and handles connected to the two ends of the semicircular hoops, and the radius of the two semicircular hoops is larger than that of a piston of a pressure maintaining cylinder and smaller than the outer diameter of a sealing ring. After the sealing ring is manually installed on the piston of the pressure maintaining cylinder, the two semicircular hoops are opened by rotating the handle, the semicircular hoops are sleeved to the position where the sealing ring is located along the piston, then the handle is controlled to reversely rotate the two semicircular hoops so that the sealing ring can be clamped by the two semicircular hoops, and then the handle is grasped to rotate the sealing ring left and right so that the sealing ring can be leveled. The method has the advantages that the method is