The utility model belongs to the technical field of unmanned aerial vehicle launching equipment, and particularly relates to an unmanned aerial vehicle catapulting device which comprises an installation cylinder, an inserted packaging cylinder is arranged on the installation cylinder, a waterproof sealing piece is arranged at the connecting position of the installation cylinder and the packaging cylinder, a cylinder cover is arranged at the top of the packaging cylinder, and the unmanned aerial vehicle catapulting device further comprises a horizontally-arranged bottom plate. An overturning plate is hinged to the bottom plate, the mounting cylinder is vertically mounted on the overturning plate, and a cylinder bottom cover is fixedly arranged at the bottom of the packaging cylinder; firstly, the ejection component is arranged to be matched with the ignition component, the ejection component has high ejection force, meanwhile, the clamping stagnation phenomenon can be avoided, the ejection component can be stably ignited through the ignition component, and therefore it is guaranteed that the launching work of the unmanned aerial vehicle is reliably conducted, secondly, the installation cylinder and the packaging cylinder can be conveniently and stably connected through the arranged ignition component, and the reliability of the unmanned aerial vehicle is improved. And finally, the arranged rotating component can be used for switching between use and storage of the mounting cylinder, and collision caused when the mounting cylinder is opened in a non-use state is avoided.