The utility model provides a water film dust remover. A spray device is arranged on the top of a cylinder body, a support frame is arranged in the middle of the cylinder body, and corrosion proof stones are filled into the upper portion of the support frame and the cylinder body of the lower portion of the spray device. An air inlet is arranged in the lower portion of the cylinder body, the air inlet is connected with an induced draft fan used for conveying dusty gases through a pipeline, the bottom of the cylinder body is connected with a water groove through a pipeline, an overflow opening is arranged below a horizontal position of the air inlet in the cylinder body, and the overflow opening is connected with the water groove through a pipeline. The height of the cylinder body is 1-5cm, the overall height of the corrosion proof stones filled in the cylinder body is larger than 30cm, and a diameter of the single corrosion proof stone is 3-10cm. According to the water film dust remover, cobblestones or other corrosion proof stones are utilized as filling materials so that the water film dust remover is low in cost, resistant in corrosion, simple in structure, convenient to machine and install, capable of increasing contacted area of gas and liquid, better in dust removing effect than a hollow cylinder body and low in system resistance; and tail gas can directly reach the standard and be discharged through adjustment of height and density of stone layers and secondary pollution is avoided.