The extruder of this line is the special designed extruder , the extruder is equipped with the temperature controlling gauges which have the advantages of high precision temperature controlling, esay and reliable operation. The vacuum calibration table equipped with the strong cooling device which ensure the cooling effect. Caterpillar type haul-off unit, equpped with the precise speed reduction motor and inverter, has the advantages of reasonable structure, powerful and stable haul-off force. The cutter has the reliable and accurate cutting effect. The stacker has the movable stacking trolley and special made rubber protection layer to provent the product from being scrathed. The downsteam equipment of this extrusion line uses the programable computer or domestic made controlling system for stable and reliable operation.