This line is made up of the conical twin-screw extruder, vacuum forming table, haul-offs, cutter, rickstand... The extruder and the haul-offs adopt the imported AC frequency control device. The vacuum pump and the electric vehicle motor employ the superior goods. The haul-offs has the traction modes such as two-caterpillars, three-caterpillars, four-caterpillars, five-caterpillars and so on. It is additionally attached with measuring apparatus and the intensifying device. The unit is reliable and efficient production.