Air filtering device and filtering part thereof

The invention provides an air filtering device and a filtering part thereof. The air filtering device comprises an absorbing chamber, a desorbing chamber, an air inlet channel, an air exhausting channel and the filtering art, wherein the absorbing chamber and the desorbing chamber are communicated with each other through at least two communication ports; the air inlet channel and the air exhausting channel are communicated with the absorbing chamber; the absorbing chamber and the desorbing chamber define a circulating type action route along the communication ports together, and the circulating type action route passes through the communication ports; the filtering part is movably arranged in the circulating type action route; the part, in the absorbing chamber, of the filtering part, is provided with a fed air filtering section and an exhausted air filtering section; the fed air filtering section is positioned between the air inlet channel and the absorbing chamber; the exhausted air filtering section is pos