The utility model relates to a drill rod with a wear-resisting alloy layer on the outer wall of an internal thread joint, which is applied to the technical field of petroleum drilling and mainly comprises a drill rod pipe body, an external thread joint, the internal thread joint and the wear-resisting alloy layer, wherein the drill rod pipe body, the external thread joint and the internal thread joint are respectively provided with a central hole, the wear-resisting alloy layer is surfaced on the outer wall of the internal thread joint, the thickness of the wear-resisting alloy layer is 3 to 8 millimeters, and the length of the wear-resisting alloy layer is 240 to 260 mm. The utility model has the effects that: the wear-resisting alloy layer is surfaced on the outer wall of the internal thread joint of the drill rod, so that the outer wall of the internal thread joint of the seriously worn drill rod is recovered to a proper size, and meanwhile, the surfaced wear-resisting alloy layer can markedly improve the wear-resisting performance of the outer wall of the internal thread joint, so that the service life of the drill rod is prolonged, the drilling material cost is saved, and the resource utilization ratio is improved.