The utility model relates to a chimney water-curtain dust remover arranged at the upper mouth of a chimney, which is characterized in that the utility model has a cylinder, the middle of which is an arc projecting outward, and the upper and the lower end of which are openings, the opening at lower end points to the upper mouth of the chimney, and the connecting edges are sealed; in the inner wall of the cylinder, three sprinkler heads are provided, which are 120-degree spaced on the circumference, and located at three planes i.e. up, middle and down plane, and are communicated with a pressure water pipe; on the upper mouth of the chimney in the cylinder, a conic drum that has a smaller upper mouth and whose lower mouth is same with the upper mouth of the chimney is provided, the upper edge of the conic drum is below the water level of the sprinkler heads; at the lower edge of the inner wall of the cylinder, and between the inner wall of the cylinder and the outer lower edge of the conic drum, a water-drain pipe is provided. The utility model is applicable for removing dust of various chimneys, is of novel structure, good dust-removing effect, and can recycle after heat.