The invention relates to a cleaning device and method for an electrostatic lampblack purification electric field which belongs to the technical field of electrostatic lampblack purification, and solves the problems that an existing cleaning device cannot automatically clean the lampblack purification electric field, the purification efficiency is low, the purification effect is poor, and a polar plate is abraded during the cleaning process. The cleaning device for the electrostatic lampblack purification electric field comprises a scraper blade, a transmission mechanism and a pipeline allowingthe fluid to be sprayed to the pole plate, the transmission mechanism is used for controlling the scraper blade to move up and down, and the scraper blade is used for scraping the dirt on the pole plate. According to the present invention, the substances difficult to melt can be removed rapidly, the cleaning efficiency is high, the purification effect is good, the damage to the polar plate duringthe cleaning process is reduced, and the service life of the polar plate is prolonged.