The invention discloses a facial covering device for automobile seats, comprising a backrest and a light-shading device. Each side of the backrest is provided with a side limiting step, the upper portion of the back of the backrest is provided with a back magnet, the backrest is releasably connected with a shaft seat in a position correspondingly below the back magnet, a rotary shaft is rotationally arranged on the shaft seat, both ends of the rotary shaft are in rotational fit with first, second, third and fourth arc ribs, the first, second, third and fourth arc ribs fit with light-shading fabric, the light-shading device is composed of arc ribs and the light-shading fabric, and a transverse rib is connected to the middle of the fourth arc rib. The facial covering device for automobile seats is simple in structure, low in manufacture cost, free to contract and extend, flexible to operate and small in size, can provide a suitable sleep environment for passengers with carsickness, and can prevent disturbances.