An ion wind air purifier comprises a machine case; an ion wind channel is arranged in the machine case in the front and back direction; the front end of the machine case is provided with an ion wind channel inlet; the rear end of the machine case is provided with an ion wind channel outlet; an emitting electrode is arranged in the front of the ion wind channel and is in the shape of a net or a fence allowing ion wind to pass through; the emitting electrode is arranged in the left and right direction; a lens plate is arranged behind the emitting electrode in the left and right direction and is provided with a plurality of rows of round through holes; a dust collecting electrode is arranged behind the lens plate and is in the shape of a net or a fence allowing the ion wind to pass through; and the dust collecting electrode is arranged in the left and right direction. The ion wind air purifier is mainly used indoors and can also be applied to outdoor squares, streets and other open space systems, the ion wind air purifier is simple in structure, convenient to manufacture, install and apply and popularize on a large scale, the concentration of particulate matter of the indoor space where the ion wind air purifier is located or the concentration of particulate matter around an area where the ion wind air purifier is located can be reduced in a short period of time, not any noise is generated in the dust removing process, and the ion wind air purifier quite saves energy.