The utility model provides an insulating wire-lifting device used for live-line work of a 35kV power-supplying line. The device includes a support assembly, an insulating cross arm, a wire lifting assembly and connection installation assemblies. The support assembly includes an installation plate and two installation boxes fixedly installed at the two sides of the upper part of the installation plate. The insulating cross arm is set up and fixed through the two installation boxes. The line lifting assembly includes two sets of speed variators, two pulleys, two insulating ropes and two insulating lifting hooks, which are arranged left and right symmetrically on the insulating cross arm. Each connection installation assembly includes a half hoop, a tightener and a rubber gasket. One connection assembly is arranged at each of the rear end of the upper part and the rear end of the lower part of the installation plate. The insulating wire-lifting device used for the live-line work of the 35kV power-supplying line is simple in structure, lower in cost, convenient to use, easy to popularize, high in security and reliability and capable of improving significantly the operation efficiency and effectively guaranteeing the personnel security of operation personnel during use; and the insulating wire-lifting device is used for live-line emergency repair and maintenance work of a 35kV power distribution line so that the domestic blank of wire lifting tools for live-line work of the 35kV power-supplying line is filled.