The utility model relates to the technical field of cable equipment maintenance tools. The portable anti-falling device comprises an insulation fixing rod, an insulation supporting rod, a fixing device and a hanging ring fixing device, at least one insulation supporting rod is arranged above the insulation fixing rod, the insulation supporting rod can enter an inner cavity of the insulation fixingrod, and the upper end of the insulation fixing rod and the lower end of the insulation supporting rod are fixedly installed together. The device is reasonable and compact in structure; convenient use, the insulating fixing rod, the insulating supporting rod, the fixing device and the lifting ring fixing device are matched for use; the anti-falling device is firmly fixed on equipment such as a concrete pole, a firm and reliable hanging and buckling point is provided for high-altitude operation in electric power overhaul, the danger of high-altitude falling of an operator is avoided, the working efficiency of overhaul operation is improved, the power failure time of a user is shortened, and the personal safety of the operator is effectively guaranteed.