Plastic paper crushing and impurity removing device

The invention relates to the technical field of plastic product recovery, in particular to a plastic paper crushing and impurity removing device which comprises a fixing frame, a crushing mechanism is arranged on the fixing frame and comprises a crushing box, and an extruding and washing mechanism is arranged below the crushing box and comprises a cylinder, an extruding mechanism, a stirring mechanism and an automatic valve. The barrel is sequentially divided into a storage barrel and an extrusion barrel in the axial direction of the barrel, the extrusion mechanism comprises a push disc, a back washing mechanism is arranged below the extrusion washing mechanism, and the back washing mechanism comprises a water tank, a pressing block and two groups of flow guide rollers. When the crushed aggregates are crushed, the crushed aggregates and water are fully stirred by the stirring mechanism, so that the crushed aggregates are fully washed, and after the crushed aggregates in the extrusion cylinder rise, the extrus