The utility model provides a movable dust removing device which comprises a movable base. Walking wheels are installed on the bottom surface of the movable base, wheel shafts of the walking wheels are connected with a driving motor, a bracket is installed on the movable base, a dust removing pipeline is installed at the top of the bracket, a dust removing cover is arranged on one side of the movable base along the walking direction of the walking wheels, the bottom of the dust removing cover is connected with a carrier which is connected with the movable base, and the top of the dust removing cover is communicated with the dust removing pipeline. According to the movable dust removing device, the walking wheels and a track are only arranged on one side of the dust removing cover, so that enough operation space can be reserved for an excavator, the dust removing device is not required to be removed when the excavator is used for stirring steel slag, steam produced by disintegrating slag can be continuously recycled, plants and devices in the plants can be prevented from being corroded by the steam, physical heath of working staff can be guaranteed, simultaneously, the excavator can not grind the track of the dust removing device during walking, and the service life of the track of the dust removing device is prolonged.