Instrument for auxiliary measurement of hole diameter of construction drill hole

The utility model discloses a construction drilling aperture auxiliary measurement instrument, which comprises a shaft body, the side wall of the shaft body is sleeved with first measuring claws which are symmetrical about the central axis of the shaft body, one side of each first measuring claw is fixedly provided with an elastic steel ring, and the other side of each first measuring claw is provided with a first groove. The device comprises two first measuring claws, two first grooves are formed in the two first measuring claws, second measuring claws are arranged in the two first grooves in a sleeved mode, adjusting assemblies extending out of the two first measuring claws are arranged on the sides, away from each other, of the two second measuring claws, and locking assemblies are arranged on the tops of the two first measuring claws. The second measuring claw is fixed with the first measuring claw, so that the first measuring claw and the second measuring claw measure together, the measuring length is in