The invention belongs to the technical field of animal repelling equipment and provides a bird repelling device. The bird repelling device comprises an air driving assembly, a smell dispersing assembly, a sound generation box and a controller, wherein the air driving assembly comprises air bowls, connecting rods, a vertical pole and a rotating ring capable of rotating around the vertical pole; the air bowls are connected with the rotating ring through the connecting rods, and reflective mirrors are further arranged on the concave sides of the air bowls; a rotating speed sensor is arranged between the rotating ring and the vertical pole; the smell dispersing assembly comprises at least one smell dispersing box with one cover door capable of being opened and a bird repellent placed in the smell dispersing box; the rotating speed sensor is electrically connected with an input end of the controller, and an output end of the controller is electrically connected with the smell dispersing assembly and the sound generation box. The bird repelling device is simple in structure and low in cost, and can repel birds under the weather conditions of windiness and no wind at daytime or at night.