Capacitive oil mass measuring device

The invention provides a capacitive oil mass measuring device. The capacitive oil mass measuring device comprises a capacitive piston structure composed of a cuboid insulating shell, a capacitive upper polar plate, soft springs and a capacitive lower polar plate, and a capacitive measuring unit connected with the capacitive upper polar plate and the capacitive lower polar plate. The two side faces, parallel to the vehicle driving direction, of the capacitive upper polar plate are connected with the soft springs. The two inner walls, parallel to the vehicle driving direction, of the cuboid insulating shell are provided with symmetric grooves for installation of the soft springs. The grooves and the soft springs are matched to enable the capacitive upper polar plate and the inner wall of the cuboid insulating shell to be vertically connected in a sliding mode, the capacitive upper polar plate serves as a floating piston of the capacitive piston structure, and the capacitive lower polar plate is symmetric with t