The utility model provides a lightning arrester live-line detection measuring clamp comprising a measuring clamp and an insulation fixed handle, and the measuring clamp is sleeved on the insulation fixed handle; the measuring clamp comprises a clamp head part, and measuring handles which are arranged at intervals are connected to the two sides of one end of the clamp head part respectively; the chuck part comprises a first clamping arm and a second clamping arm, clamping teeth are arranged on the adjacent sides of the first clamping arm and the second clamping arm, and measuring clamp bindingposts are arranged at the ends of the sides, away from each other, of the first clamping arm and the second clamping arm. By fixing the insulating fixed handles of the hollow resin hard tube on the two measuring handles of the measuring clamp, the length of the handles of the measuring clamp is changed, live detection of the lightning arrester with the discharge counter installed too high is facilitated, and the wiring efficiency is improved; the first clamping arm and the second clamping arm of the universal measuring clamp are bent by 90 degrees, so that the measuring angle of the measuringclamp can be changed, a person can stand below a lightning arrester for wiring, and the universal measuring clamp is labor-saving and convenient.