The flat yarn making machine is adopted micro-processor control, frequency conversion governor and setting and displaying technical data may be fully digitized on the base of absorbing international advanced techniques. The main parts use quality products. The line engines L/D ratio and adopts new types of separating screw and widens mixing smelt zone on the extruder screw pot which is specially processed using quality steel, fine plasticized effect, low energy consumption. Changing filler system of the film stretching line, we apply advance automatic belt change filter. The bake-board is changed into advanced hot drawing oven and principal technical index of the reaches international advanced level. The winding machine is of friction-free drive and constant tape tension wind, good formation quality of the fiber drum. The structure of the line is compact with a pleasing appearance, smooth running, flexible and reliable control, sophisticated manufacture engineering, convenient operation and reliable production, it can be used in producing flat fiber form thermoplastic, such as polypropylene(PP) and high-density polyethylene(HDPE) etc.