The application discloses a power special safety isolation fence for preventing mistaken entry into a live area, relates to the technical field of power protection isolation and
smart grid, and is characterized in that a plurality of middle convex counter clamping plates are equidistantly arranged between two fixed support frames, a plurality of middle convex joint plates are equidistantly arranged between the two fixed support frames, a developing
torsion spring is welded at the middle of one end of the plurality of middle convex counter clamping plates and the plurality of middle convex joint plates, joint torsion springs are welded at both sides of the one end of the plurality of middle convex counter clamping plates and the plurality of middle convex joint plates, and a multi-hole middle limiting plate is clamped at one end of the developing
torsion spring. The fence is adjusted by itself, and a warning linkage is cooperated with an outward expansion component, so that the distance of protection is expanded without increasing the number of fences, the actual protection cost is reduced, a person who breaks in is warned by cooperating with a contact alarm component and an environment exploration component, and a background staff member is fed back in time, so that the mistaken entry into a live environment is avoided, and the actual isolation protection effect is improved.