The utility model discloses an automatically vertical exhaust blower air inlet device which comprises an installing support frame. The installing support frame comprises an installing frame. A plurality of perpendicular pieces are arranged in the installing support frame, wherein the plurality of perpendicular pieces are arranged in rows. Each perpendicular piece comprises a perpendicular piece body. A perpendicular piece rotating shaft is arranged on one side of the perpendicular piece body, wherein the perpendicular piece is arranged along the length direction of the perpendicular piece body. Two ends of the perpendicular piece rotating shaft are ratatably arranged on the installing frame. One side of the perpendicular piece is covered on the perpendicular rotating shaft of the adjacent perpendicular piece body, wherein the side of the perpendicular is far away from the perpendicular rotating shaft. One side of the installing frame is provided with an air inlet face which is close to the perpendicular piece rotating shaft which is covered by the adjacent perpendicular piece body. When air comes into the air inlet face, the perpendicular pieces can rotate under the action of air flow. The positions where the perpendicular piece body is covered on the adjacent perpendicular body are mutually separated, and therefore an air inlet is formed. According to the automatically vertical exhaust blower air inlet device, the air inlet can be opened with the air-in of the air inlet face, and the size of the air inlet can be changed with the volume of the air volume so that exhaust air rate can be adjusted. The automatically vertical exhaust blower has good function of energy conservation and emission reduction, and the size of the air inlet can not be manually adjusted, the process is convenient.