The machine unit can take PP,PE as the raw materials which should been heated,extruded,cooled,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 is 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. Then machine unit can save the power consumptions. It's 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 HV950. 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. This type machine can draw and stretch flat fibers of the width from 1.4 mm to 7 mm. It has the following characters: (1) reduce the cost of raw materials: it can take powder materials, granule materials or reclaimed materials as raw materials. (2) The screw and cylinder of the extruder made of 38CrMoAlA alloy steel is hard and durable, its hardness is much higher than HV950. (3) The extruder and drawing device are controlled by the step less speed charge device. (4). All the drawing rollers have been treated by the electroplating with the hard chromium; their service livers had been extended much longer. (5) Its easy to install, assemble and maintain.