Aircraft catapult utilizing hydraulic power and hinge connecting rod structure

The invention relates to an aircraft catapult utilizing hydraulic power and a hinge connecting rod structure. The catapult is composed of a hydraulic power part, a mechanical transmission part and an engine base, wherein a hydraulic transmission part is composed of five high-pressure oil cylinders; a hinge structure is adopted among all the connecting rods (5) of the hinge connecting rod structure; a guide rod (8) is transversely arranged in front of the engine base (1), and the two ends of the guide rod (8) are respectively provided with a hinge lug (9) which can slide along the guide rod (8); and the five high-pressure oil cylinders drive the hinge connecting rod structure to catapult an aircraft. The catapult of the invention has small volume, small occupied naval vessel space and high efficiency, and provides ideal driving force and ejection force for launching various aircrafts on aircraft carriers; the thrust is large, thus providing possibility of launching heavy aircrafts on the aircraft carriers; and the catapult has simple process and low construction cost, and does not consume invaluable fresh water resources for naval vessels sailing at sea.