The machine unit can take PP, PE as the raw materials which should been heated, extruded, cut & drawn to the flat fibers. The flat fibers would be rolled on the bobbins for weaving the sacks by the circular loom. The flat fibers can be drawn by the materials including of the reclaimed materials, powder or pellet materials and the mixed materials of them. In this case, the suitable range of the materials has been extended more. The machine unit can save the power consumptions. Its quite convenience for operating & maintenance of the machine unit. The cylinder & screw of the extruder are made by alloy steel of 38CrMoAlA. After the treatment of Nitric, its hardness is much higher than HV 950. The extruder and drawing devices are controlled by step less speed charge device. Since all the drawing rollers had been treated by Electroplating with the hard Chromium, so their service lives had been extended much longer.