The utility model discloses a protection device for be used for distribution network tower pole, including base, support and sleeve, base and muffjoint are in the same place to the support, the sleeve includes installation cavity and flexible chamber, installs controller and photovoltaic power in the installation cavity, install electro -magnet, spring, extensible member and guide bar at flexible intracavity, the electro -magnet passes through the wire with the interior controller of installation cavity and is connected, the one end of guide bar is fixed on the electro -magnet, and the other end of guide bar stretches into in the blind hole of extensible member, the spring housing is established on the guide bar, being equipped with in the front portion of extensible member and holding the chamber, install the motor of being connected with the controller in holding the storehouse, elasticity thorn strip is installed to the output shaft and the pedestal connection of motor on the base, install infrared sensor at telescopic lower extreme, infrared sensor is connected with the controller.