Air-drop device for unmanned aerial vehicle

The utility model belongs to the technical field of unmanned aerial vehicles, and particularly relates to an air-drop device for an unmanned aerial vehicle, which comprises a mounting plate, the mounting plate is assembled at the bottom of the unmanned aerial vehicle, a positioning part is assembled at the bottom of the mounting plate, a mounting part is assembled at the bottom of the positioning part, the mounting part comprises a concave block, an electromagnet is assembled at the bottom of the positioning part, and the electromagnet is arranged on the mounting plate. A square hole is formed in the center of the bottom of the U-shaped block, a spring is arranged on the inner side of the bottom of the U-shaped block, the other end of the spring is fixedly connected with a permanent magnet, the electromagnet repels the permanent magnet when powered on, and a hook assembly is assembled on the bottom side of the permanent magnet. When the air-drop device is used for hanging materials, repulsive force is generat