At present WPC extrusion line has two ways: one step way and two steps way: one step way mainly used to produce PVC wood plastic product, two steps way mainly used to extrude PP/PE wood plastic product. The screws and barrel is treated by bimetal treatment, wearable and anti-erode, featured in good plasticization, high capacity, energy saving and wood podwer and the other wooden fibre can occupied high quantity as 50-70%. This equipment is an ideal choice for customers who want to produce wood tray, indoors and outdoors floor, fences, warehouse plate and outdoors decorative material and so on.