The invention relates to a portable grounding wire transmitter and a using method. The portable grounding wire transmitter comprises a main hanging bracket, a large gear, a rope wheel, an insulated rope, a small gear, a gear shaft, a ratchet, a rope wheel shaft and a limiting device, wherein the small gear and the gear shaft are fixedly connected; the gear shaft and the main hanging bracket are connected via the ratchet; the large gear and the small gear are engaged mutually; the large gear is fixed at the end part of the rope wheel; the insulated rope is wound on the rope wheel; the rope wheel is arranged on the rope wheel shaft; the rope wheel shaft is fixed on the main hanging bracket; and the limiting device is arranged on the main hanging bracket for braking of the large gear. The portable grounding wire transmitter has the advantages that the practical problems of large physical consumption when the grounding wire is traditionally carried to climb up and down an iron tower and high risk factor can be solved; labor of an operator is saved, carrying is convenient, the work efficiency is improved, and safety is improved; an electric wrench is used for providing power for the transmitter, heavy loads such as an electroscope and the grounding wire are enhanced through transmission of the gear, and labor of the operator is saved; and the main bracket adopts an aluminum alloy material, self weight is reduced, and carrying is facilitated.