The production line is consist of conical twin screw extruder and auxiliary machines for granulation. The line is suitable to produce WPC pellets or feeding pellets. The auxiliary machines inculdes mould surface cutter, fan sender and collector, vibrating seperator and cooler. The line is of high automation, very good production efficiency. The pellets produced by this line is of uniform size, good density and good looking. The profiles produced by these pellets have the advantages of high strength, good tenacity, smooth surface, large capacity, etc.