The application provides a cross-domain vehicle and a navigation method, and belongs to the technical field of cross-domain vehicles.The vehicle comprises a catamaran main body, a composite propulsion module and a semi-submersible floating body structure, the catamaran main body is provided with an
underwater propeller, and the catamaran main body is connected with the semi-submersible floating body structure;the top of the semi-submersible floating body structure is provided with a foldable rotor
system, the foldable rotor
system is connected with a rotor engine, and is retracted and closely attached to the vehicle body in the
water entry or
underwater stage, so as to reduce fluid resistance; the composite propulsion module comprises a front anti-torsion
ducted propeller and a
tail pitch ducted propeller which are installed on the semi-submersible floating body structure.The application effectively solves the problems that the traditional water
navigation tool and the aerial vehicle have single functions and are difficult to efficiently cooperate in a complex environment, realizes water-air amphibious autonomous switching and attitude stable control, and provides a multifunctional and efficient operation platform for the fields of
ocean exploration,
emergency rescue and cross-domain logistics.