The invention discloses an auxiliary device for ground wire suspension. The auxiliary device comprises a base, wherein a plurality of universal wheels are arranged at the bottom of the base; two oppositely arranged lateral box plates are vertically and fixedly connected to the left side and the right side of the base separately; a lifting beam driven by a first motor is vertically arranged on theinner side wall of each of the two lateral box plate in a sliding manner; a sliding plate driven by a second motor is arranged between the two lifting beams along the forward and backward directions in a sliding manner; a folding frame driven by a third motor is arranged in the middle of the sliding plate; and a support groove for arranging an unloader rod body is arranged in the folding frame. The auxiliary device is simple in structure, convenient to implement, time-saving and labor-saving in operation and high in automatic degree, and the operation problem of a large-sized ground wire unloader is thoroughly solved.