a method of manufacturing thermoplastic flexible transparent pvc film without flow marks and air pit is capably provided with high efficient production to upgrade the quality of plastic film , which is included the following steps : calendering melted plastic material by calenders into melting plastic film with predetermined thickness , quickly chilling and setting the melting plastic film with chilling water , removing water from the cooled plastic film , heating the plastic film to dry out any residual water and controlling the plastic film again to a temperature from 30 ° c . to 85 ° c ., and applying a pressure ranging from 1 kg / cm 2 to 8 kg / cm 2 on the plastic film while winding it into a roll . plastic film produced with this method has good transparency and smooth surface without flow mark and air pit .