The invention relates to a servo-type smoke cleaning device for a high-temperature molten iron conveying device used for casting. Connecting plates (302) are arranged on the two sides of a box (301); a connecting bracket (303) with a U-shaped structure is connected with the tops of the connecting plates (302); the connecting bracket (303) is arranged on a traveling dolly which is arranged on a rail (1) in a sliding form; an air inlet (305) is formed on a lateral box wall of the box (301); a plurality of filtering core plates are arranged in the box (301); filtering nets are arranged between the filtering core plates and the air inlet (305); an air draft fan is arranged on one side of the filtering core plates away from the air inlet (305); an air outlet drum (304) is arranged at the top of the box (301); an air inlet end of the air outlet drum (304) is communicated with an air outlet end of the air draft fan; an air inlet pipe (307) is connected with the air inlet (305); a dust collecting cover is connected with the air inlet pipe (307). The servo-type smoke cleaning device for the high-temperature molten iron conveying device for casting provided by the invention is environment-friendly and free from pollution.