The production line is specially used for extrusion production of PVC, PE, PP wood plastic foamed door panel and window sill panel. The production line has the advantages of large output, stable extrusion and high foaming rate. Can produce all kinds of decorative products, a wide range of uses. The surface hardness of the product is high, smooth and flat, and the specific gravity can be controlled between 0.6-0.9kg/m3.