Automatic screen changer of plastic extruder

　　The utility model aims at providing an automatic screen changer of a plastic extruder. The automatic screen changer can synchronously remove the impurities attached to the filter net when the plastic extruder is working, avoid the accumulation of impurities affecting the quality of finished products and work progress, reduce material loss, energy waste and production time, and reduce production costs. The technical scheme of the utility model: An automatic screen changer of a plastic extruder includes a parting surface, on which a filter screen is arranged. The filter screen is located between the filter area and the die of the extruder. The two ends of the filter screen are provided with a release shaft and a take-up shaft, and the side of the filter screen is provided with a cold and heat control temperature zone.