Based on adopting advanced foreign technology and combining research outcome and experience of years hard work on producing plastic woven bags, Flat Film Extrusion and Stretching Machine with the brand "Tiandi ", is designed and manufactured elaborately. Machines of the series take the lead to apply many advanced technology widely such as micro-computer control, frequency conversion adjustment, and automatic change filter etc, which makes all technical indexes reach the top level in china, and advanced level abroad all the time. These machines have many traits such as artistic modeling, scientific structure, high efficiency, low energy consumption etc and are used for shaping PP, HDPE, LDPE, and other kinds of flat films.