Plastic extruding flat film stretching line uses micro-processor control, frequency conversion governor and silicone controlled DC governor etc.on the basis of absorbing foreign advanced techniques.The main parts use foreign quality products. The line enlarges L/D ratio and widens mixing smelt zone on the extruder screw pot which is specially processed using quality steel.For the change filter system of the flat film stretching line,we apply advanced foreign automatic belt change filter.The bakeboard is changed into foreign advanced hot drawing oven and principal technical index of the line nears international advancing level. The line has the performance of high speed,top yield, low energy consumption, good forming 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 many aspects,especially in various flat fiber forming conversions of thermoplastic, such as polypropylene, high density polyethylene, linear low density polyethylene, etc.