Dedusting air door automatic switch device and dust collector with the same

The invention discloses a dedusting air door automatic switch device and a dust collector with the same. The dedusting air door automatic switch device comprises a wind chamber formed by an upper cover plate, a lower cover plate and a plurality of side plates in a surrounding mode. An upper air vent is arranged on the upper cover plate. A lower air vent is arranged on the lower cover plate. The upper air vent is connected with a tubular shape upper connecting end. The lower air vent is connected with a tubular shape lower connecting end. A wind board capable of blocking an air vent of the lower connecting end is arranged at one end, placed inside the wind chamber, of the lower connecting end. In addition, the wind board is capable of rotating within an included angle formed by a horizontal plane and a vertical plane. An air-out pipeline of the dust collector is provided with the dedusting air door automatic switch device. The dedusting air door automatic switch device is capable of preventing dust backflow ef