The invention discloses an automobile air bag device. The automobile air bag device comprises a placing casing, wherein an igniter is arranged at the internal bottom end of the placing casing, an external air bag is arranged at the top end of the igniter, a middle-layer air bag is arranged in the external air bag, and an internal air bag is arranged in the middle-layer air bag; the external air bag and the internal air bag are both connected with the middle-layer air bag through snifting valves; each snifting valve comprises an upper connecting platform and a lower connecting platform, wherein the upper connecting platform is connected with the lower connecting platform through a connecting barrel, openings are separately formed in the external wall of the upper connecting platform and the external wall of the lower connecting platform, and an air outlet is formed in the upper connecting platform. According to the automobile air bag device, the external air bag, the middle-layer air bag and the internal air bag are matched, after the internal air bag is filled with air, the air breaks through the corresponding snifting valve to enter the middle-layer air bag, and after the middle-layer air bag is filled with the air, the air breaks through the corresponding snifting valve to enter the external air bag, so that the air bag gradually expands, the situation that the air bag expands at a time to impact face of a human body is avoided, and the injury of the face of the human body is avoided.