Wire direct current resistance testing device

The utility model relates to a lead direct current resistance testing device which comprises a rack, a left current end, a right current end and a lifting mechanism, one end of a tested lead is fixedly connected to the left current end, the other end of the tested lead is fixedly connected to the right current end, a first push rod is arranged on the rack, tension is applied to the tested lead by means of extension of the first push rod, and the tested lead is connected with the lifting mechanism. Current is introduced to the tested wire through the left current end or the right current end, and an acquisition mechanism is arranged between the lifting mechanism and the rack; the utility model has the advantages that the tested wire is fixed on the rack through the left current end and the right current end, and the right current end is movably connected on the rack, so that a certain pulling force can be applied to the tested wire through the movement of the right current end on the rack before testing, and t