In order to improve the efficiency and safety of search and rescue (SAR) at sea, this paper proposes a kind of emergency rapid rescue unmanned craft (air-dropped unmanned maritime motorized search and rescue platform) that can be delivered by a large transport aircraft. This paper studies the structural design scheme of the platform, and the main scale of the platform, the choice of power system and the impact resistance performance are considered in the design process to ensure its rapid response and effective rescue capability under complex sea conditions. Simulation results show that the platform can withstand the impact of air injection into the water and the shipboard equipment can operate normally under the impact load, thus verifying the feasibility and safety of the design. This study serves to improve the maritime search and rescue system and enhance the oceanic emergency response capability.