Self-cleaning air filtering device

The utility model relates to the field of air filtering equipment, and discloses a self-cleaning air filtering device which comprises a base, a filter plate rotating and replacing mechanism and a filter plate cleaning mechanism, the top end of the first supporting plate is fixedly connected with the peripheral face of an air inlet pipe. The filter plate rotating and replacing mechanism is movably installed on the first supporting plate, the filter plate rotating and replacing mechanism can move in the axial direction of the air inlet pipe, no less than two filter plates are arranged on the filter plate rotating and replacing mechanism, and a first linear driving component is installed on the first supporting plate; the filter plate rotating and replacing mechanism is driven by the linear driving part I to move, so that one filter plate closes or is separated from the port of the air inlet end of the air inlet pipe; the problems that sealing is not tight when the sealing ring is thin, a large motor needs to be