Waste plastic bottle piece cleaning pretreatment device

The invention discloses a waste plastic bottle piece cleaning pretreatment device which comprises a cleaning tank, the side wall of the cleaning tank fixedly communicates with a feeding pipe, the side wall of the side, away from the feeding pipe, of the cleaning tank fixedly communicates with a conveying box, and a plurality of rotating shafts are rotationally connected into the conveying box in a penetrating mode; a conveying belt is arranged between the two rotating shafts on the unified horizontal line in a sleeving mode, a driving shaft is rotationally connected into the cleaning tank in a penetrating mode, and a first cleaning disc, a second cleaning disc and a third cleaning disc are fixedly connected into the cleaning tank. The problem that attachments cannot be cleaned in the cleaning process of waste plastic bottle pieces in a traditional mode is solved, and the attachments on the side walls of the plastic bottle pieces are repeatedly cleaned in a multi-layer separation rotating cleaning mode by arra