The invention discloses an anti-drop device capable of embracing a pole during power outage, for a pole-climbing robot. The anti-drop device comprises two electromagnetic circuits, two telescopic poles, two compression springs, two pole embracing arms and two armatures, wherein the two electromagnetic circuits are symmetrically mounted in a hexahedral frame; each electromagnetic circuit is an electromagnet wound with a coil in a plurality of turns, and the coils and motors adopt the same power supply; one end of each telescopic pole is connected to the inner lateral side of a position at which the corresponding electromagnet is mounted, on the hexahedral frame, and the other end of the telescopic pole is connected with one pole embracing arm; each compression spring is arranged at the outer part of the corresponding telescopic rod in a sleeving manner; each armature is mounted at a position corresponding to the electromagnet, on the corresponding pole embracing arm. The anti-drop device capable of embracing the pole during power outage, for the pole-climbing robot, provided by the invention, is mounted on the conventional pole-climbing robot and can prevent the aloft pole-climbing robot from dropping due to accidental power outage when the robot climbs along the pole, so that the anti-drop device is good in safety; the anti-drop device has the advantages of being reasonable in structural design, simple and convenient to use, low in cost, and the like.