The invention discloses an online dedusting device of a web die-
cutting machine. The online dedusting device comprises a
machine frame, a conveying device, a paper pressing device and dust blowing device and a dust absorption negative pressure device. The conveying device comprises a conveying roll shaft and a conveying belt with holes and is mainly used for conveying products to be dedusted; the paper pressing device and dust blowing device comprises a first shaft, a second shaft, paper pressing wheel carriers, paper pressing wheels, blowing
nozzle carriers, blowing nozzles and a
positive pressure air pipeline, the first shaft and the second shaft are transversely installed on the
machine frame, the first shaft is arranged in the input direction of the products to be dedusted, the second shaft is arranged in the output direction of the products to be dedusted, the first shaft is symmetrically provided with one row of paper pressing wheel carriers and one row of paper pressing wheels, the second shaft is symmetrically provided with the other row of paper pressing wheel carriers and the other row of paper pressing wheels, the blowing
nozzle carriers in a row and the blowing nozzles in a row are correspondingly installed at the positions, adjacent to the corresponding paper pressing wheel carriers and the corresponding paper pressing wheels, of the second shaft, and the blowing nozzles are communicated with the
positive pressure air pipeline; the dust absorption negative pressure device comprises a housing, an air suction port and an air suction
pipe, one end of the air suction
pipe is connected with the air suction port, and the other end of the air suction
pipe is connected with an air suction pump. The online dedusting device can guarantee normal work of online quality detection and eliminate false alarms caused by dust.