Tubular live-across despooling device

The utility model relates to a tubular live-across despooling device, belonging to a lead despooling device, comprising a despooling insulation tube, an eye through which an insulation rope is penetrated is arranged on the despooling insulation tube, a glass steel tube is arranged in the despooling insulation tube, two ends of the glass steel tube are respectively provided with a pulley. When in use, the despooling insulation tube is fixed two base towers of an across file by a high-strength insulation rope so as to be suspended above crossed lines and keep the safe distance; the lead is guided by a traction rope to pass through the despooling insulation tube to realize the live-across. As it is unnecessary to erect an across rack for the construction and use, the cost can be saved and the field influence is avoided.