Lifesaving device for preventing drowning and spontaneous combustion of automobile

A lifesaving device for preventing drowning and spontaneous combustion of an automobile comprises a water level sensor, a carbon dioxide compressed gas cylinder, an electromagnetic valve, a smoke sensor, a temperature sensor and a plurality of air bag assemblies which are installed on the automobile. The airbag assembly comprises airbags and an airbag protection box, the carbon dioxide compressed gas cylinder is connected with a plurality of inflation pipelines through an electromagnetic valve, and the inflation pipelines are connected with the airbags respectively; the smoke sensor and the temperature sensor are both installed in an engine compartment of the automobile, the carbon dioxide compressed gas cylinder is further connected with a first fireproof pipeline and a second fireproof pipeline through electromagnetic valves, and the end of the first fireproof pipeline is connected with a first nozzle located in the engine compartment. The end of the second fireproof pipeline is connected with a second nozz