The invention discloses a lightweight level determination method and device for an electric automobile and a storage medium, and belongs to the technical field of electric automobiles. The method comprises the following steps: acquiring the unladen mass, battery capacity, maximum driving mileage, footprint area and motor total power of the electric automobile; determining the lightweight coefficient of the electric automobile according to the unladen mass, battery capacity, maximum driving mileage, footprint area and motor total power of the electric automobile; determining the lightweight level of the electric automobile based on the lightweight coefficient of the electric automobile. By adopting the lightweight level determination method, the lightweight coefficient of the electric automobile is determined through the unladen mass, battery capacity, maximum driving mileage, footprint area and motor total power of the electric automobile, and the lightweight level of the electric automobile can be determined according to the lightweight coefficient, so that related organizations, users or electric automobile manufacturers can assess the lightweight level of the electric automobileby determining the lightweight coefficient of the electric automobile in order to prompt the development of an electric automobile lightweight technology.