Miniaturized calipers for overhead line

The utility model discloses a miniaturized caliper for an overhead line, which is characterized in that the miniaturized caliper comprises an insulating groove-shaped shell and a U-shaped fixed block fixedly arranged in the insulating groove-shaped shell, a movable sliding block capable of sliding is arranged in the U-shaped fixed block, a telescopic guide rod is fixedly arranged at the lower part of the movable sliding block, and the telescopic guide rod is fixedly connected with the U-shaped fixed block. A guide hole matched with the telescopic guide rod in a sliding mode is formed in the first side wall body of the U-shaped fixing block, a threaded hole channel is formed in the second side wall body of the U-shaped fixing block, a threaded rod is connected into the threaded hole channel in a threaded mode, and the first end of the threaded rod extends out of the second side wall body of the U-shaped fixing block. And the second end of the screw rod is rotationally hinged to the side wall body of the movabl