The invention provides an air purification device which is used for purifying air entering through an air inlet (1) and discharging the purified air through an air outlet (4). The air purification device comprises a charging unit (2) and a dust collection unit (3), wherein the charging unit (2) is used for processing air flowing in through the air inlet (1) and charging solid particles in the air; the dust collection unit (3) is used for processing the air flowing out through the charging unit (2) and collecting the charged solid particles in the air, thereby purifying the air; an electric field is formed in the dust collection unit (3); the electric field is used for enabling the charged solid particles to be applied with force in the direction opposite to airflow direction so that the charged solid particles are deposited in the dust collection unit (3). A dust collection plate of the air purification device is free of replacement and convenient to wash; meanwhile, the one-time purification efficiency is improved.