The utility model relates to a waste residue dust removal auxiliary equipment's technical field especially relates to an environment -friendly waste residue washing dust collector for cast iron, and its work box angle can conveniently be rotated, improves its adaptability, and the work box height can conveniently be adjusted, reduce it and use the limitation, and the easy washing of waste residuethoroughly to improve its result of use, including bottom plate, four group's support and work boxs, work box left side intercommunication is provided with the inlet tube to be provided with the waterintaking valve in inlet tube department, work box right side below intercommunication is provided with the discharge tube, and is provided with the discharge valve in discharge tube department, and work box top intercommunication is provided with the feeder hopper, and is provided with at feeder hopper top input and keeps off the lid, the bottom plate includes plate body and lower plate body, still includes pivot, two sets of pillar and two sets of pulley, and lower plate body top is provided with the standing groove to be provided with ball bearing in the standing groove, four zhi jun of group include cylinder and telescopic link, still include motor, transmission shaft and stirring leaf.