Roller blind type dust collecting screen

The utility model discloses a roller blind type dust collecting screen. Bearings are fixed to the two ends of a transverse fixing frame of an outer big fixing frame, and rolling rollers are arranged in the bearings at the two ends of the transverse fixing frame. Driving gears are fixed to the lower portions of vertical fixing frames, driven gears are fixed to the top ends of the vertical fixing frames, the driving gears and the driven gears are connected through chain rails, the rolling rollers are fixed to the driven gears, and a dust collecting mesh is connected to the rolling rollers. A water curtain fixing frame is fixed to the transverse fixing frame of the outer large fixing frame, and a purifying water curtain is fixed to the water curtain fixing frame. The roller blind type dust collecting screen is fixed to anchor bolt rods or anchor bolt ropes of plates, the rolling rollers are driven to rotate through the driving gears and the driven gears, and thus the purpose of lifting or lowering the dust colle