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The production line unit of PVC door, wall panel and cabinet decorative line adopts specially designed sjz65 or sjz80 conical twin-screw extruder. It adopts imported frequency converter for speed regulation and imported RKC temperature control instrument, which has the advantages of wide adjustment range, high temperature control precision, convenient and reliable operation and so on. The auxiliary machine is composed of vacuum setting table, tractor, cutting machine and stacking frame. Equipped with large forced cooling device to ensure the shaping effect of door plate. Crawler tractor adopts imported reducer motor and frequency converter, which has the advantages of reasonable structure, large traction force and stable traction. The cutting machine has the advantages of reliable and accurate operation and high cutting precision. The pushing frame is attached with a movable pushing trolley and a special rubber protective layer, which has the advantages of no material damage and simple use. The auxiliary unit adopts programmable computer control or domestic famous brand control system, and the whole machine control is reliable and stable.