Filter screen self-cleaning device for ventilating duct

The utility model discloses a filter screen self-cleaning device for a ventilating duct, which belongs to the technical field of filter screen cleaning devices and comprises a communicating pipe, one end of the communicating pipe is communicated with a filter pipe, a rotating component is rotatably mounted in the filter pipe through a bearing, and a driving component for driving the rotating component to operate is mounted in the filter pipe. A cleaning plate is detachably mounted on an inner ring of the rotating assembly, the bottom of the rotating assembly extends out of the filter pipe and is provided with a dust collection cover, a cover plate with a blocking net in the middle is mounted at the top of the filter pipe through a detachable structure, a filter net is detachably mounted at the position, located on the outer ring of the blocking net, of the bottom of the cover plate, and the filter net can be clamped to the top of the rotating assembly; the filter screen solves the problems that after dust is