Grounding caliper and grounding device

The invention discloses a grounding caliper and a grounding device. The grounding caliper comprises an upper caliper, a lower caliper, a movable caliper, a connecting column and a driver; the lower caliper is used for being connected with the top of an unmanned aerial vehicle; the two ends of the connecting column are connected with the middle parts of the upper caliper and the lower caliper respectively; a wire slot for accommodating an overhead line is formed between the upper caliper and the lower caliper; and the movable caliper sleeves the connecting column; the driver is connected with the movable caliper; the driver is used for driving the movable caliper to move along the length direction of the connecting column, so that the upper caliper and the movable caliper can clamp or loosen the overhead line. The two ends of the connecting column are connected with the upper caliper and the lower caliper respectively, and the movable caliper sleeves the connecting column, so that the overhead line can enter t