Offset press capable of avoiding material pollution

The utility model provides an offset press capable of avoiding material pollution, which relates to the technical field of offset presses and comprises a conveying frame, an offset press body and a conveying belt, and a cleaning box is mounted below the conveying frame. The offset printing machine has the advantages that materials are conveyed on the conveying belt, the offset printing machine body conducts offset printing work, batting sundries and dust particles attached to the conveying belt make contact with the electrostatic adsorption roller, then the batting sundries and the dust particles are adsorbed to the electrostatic adsorption roller and scraped off by the scraping plate in the rotating process, and meanwhile the batting sundries and the dust particles are prevented from being scraped off by the scraping plate. The transmission assembly can drive the moving block to reciprocate so as to repeatedly extrude the air bag, generated air is sprayed to the conveying belt through the nozzle, sundries ar