The invention relates to an air flue optimizing method of an air purifier. The air purifier comprises an air inlet, and the inside of the air inlet is provided with an electrode plate and an electrode. The method comprises adjusting the angle and the position of the electrode plate to enable the electrode plate to be tangential to the air intake direction of the air inlet and to be in a staggered state with a neighboring electrode plate to form a buffering air flue. The invention also discloses the air purifier applying the air flue optimizing method. The air flue optimizing method of the air purifier has the advantage of, by means of the buffering air flue, achieving the effects of buffering the velocity of air flow and further obtaining efficient dedusting and sterilizing effects.