A dry type hollow electric reactor bird repelling system comprises an inner cover and an outer cover, wherein the inner cover is in a cylindrical shape with an upper opening, the outer cover is in a cylindrical shape with a lower opening, the inner cover is located in the outer cover, and the center line of the inner cover coincides with the center line of the outer cover; a power source, an ultrasonic generator, a Doppler radar, a single-chip microcomputer, an infrared temperature measuring device and a yellow pulse light source are arranged in the outer cover; a connecting hole is formed in the side wall of the outer cover, the yellow pulse light source is opposite to the connecting hole, and the power source is connected with the ultrasonic generator, the Doppler radar, the single-chip microcomputer, the infrared temperature measuring device and the yellow pulse light source separately; the single-chip microcomputer is connected with the ultrasonic generator, the Doppler radar, the infrared temperature measuring device and the yellow pulse light source; a connecting plate is arranged at the bottom of the inner cover, and a connecting frame is arranged on the connecting plate. The system has the advantages that the influence of the system on human life can be reduced as much as possible, the outer cover and the inner cover can prevent rainwater and dust from entering the outer cover so that the ultrasonic generator and the power source can be prevented from being damaged, and the service life of the ultrasonic generator and the service life of the power source are prolonged.