Aiming at the inefficiency of the current maritime search and rescue system, this paper aims to provide a conceptual design scheme for an amphibious unmanned surface vehicle that can realize the integration of air and water. In this design, detailed mechanical and structural analysis were performed for each part. The amphibious unmanned vehicles can independently choose the air flight and surface navigation conditions in harsh sea conditions, to cruise and rescue work. At the same time, the

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... ibious unmanned vehicle can realize the rapidly transfer between water and air modes through the water-air dual-purpose propulsion module, thus improving the efficiency of cruise and rescue.