Backwashing-type ultrasonic filter

The utility model discloses a backwashing-type ultrasonic filter which comprises a filter element and a filtration fabric, wherein the filter element is porous and achieves a support effect; the filtration fabric is fixedly arranged at the external surface of the filter element; the periphery of the filtration fabric is provided with an outer barrel; the outer barrel and the filtration fabric form a filtration cavity; the outer barrel is provided with an ultrasonic generator capable of shaking off filtration residues on the filtration fabric; the upper part of the outer barrel is provided with a seal cover which can be sealed by virtue of a pinch-off seal ring; the outer barrel is connected with an inlet; the inlet is provided with a drainage valve, an inlet valve and a pressure gauge; the seal cover is connected with an outlet; the outlet is provided with an exhaust valve, an outlet valve and a pressure gauge. The backwashing-type ultrasonic filter is smart and simple in structural design; by virtue of reaso