The invention discloses a bird repelling device for protecting a power box, which comprises a power box, a mounting plate, an electric push rod, a fixing card, a fixing seat, a bird repelling shell, an electric heating plate, a diffusion cover, a suction fan, a medicine box, a miniature Water pump, atomizing nozzle, injection tube, protective shell, battery, charge and discharge controller, solar panel, infrared photoelectric sensor, infrared sensor switch, rotating shaft, fixed plate and spring. The invention can not only effectively expel the birds, but also facilitates the installation and use of the device; the atomized bird repellent is sprayed out through the atomizing nozzle, and then evaporated and diffused by the electric heating plate and the suction fan, so that effective repellent can be achieved. bird repellent, and the bird repellent will not cause harm to birds, which is beneficial to the protection of birds; at the same time, the bird repellent shell can be installed and disassembled through the fixed card and the electric push rod, which improves the installation efficiency of a single bird repellent device and avoids The potential safety hazard caused by too long time can realize the rapid installation of the bird repelling device, which is suitable for popularization and use.