Positioning fixture for guaranteeing coaxiality of shaft hole of butterfly valve

The utility model relates to a positioning clamp for guaranteeing the coaxiality of a shaft hole of a butterfly valve, which comprises a clamping plate, and a clamping end face for placing and fixing a butterfly valve body is arranged on the clamping plate. Clamping parts are arranged at the two ends of the side part, close to one side of the flange part of the butterfly valve body, of the clamping plate correspondingly, and the two clamping parts can apply clamping acting force to the middle correspondingly so as to clamp the flange part; a limiting sleeve is arranged on the clamping end face, the limiting sleeve is arranged far away from the clamping part, the limiting sleeve is located on the inner ring of the butterfly valve body after the butterfly valve body is placed and fixed on the clamping end face, and the limiting sleeve is provided with a limiting hole; the center points of the two clamping parts and the center point of the limiting hole are located on the same straight line. Two butterfly valve