The invention relates to complete equipment for manufacturing polytetrafluoroethylene oriented films and a method thereof. The complete equipment comprises a mixer, a curing box, a moulding press, a pushing press, a cutting device, a three-roller calender and a stretching device which are sequentially arranged according to technical requirements. Polytetrafluoroethylene (PTFE) dispersed powder is prepared into a PTFE hollow pipe through moulding and pushing; the PTFE hollow pipe is longitudinally cut and is unfolded into thin slices; the thin slices are fed into the three-roller calender to be calendered into PTFE thin films; and the PTFE thin films are stretched into the polytetrafluoroethylene oriented films. The complete equipment and the method have the beneficial effects that: a traditional method of calendering a solid cylindrical blank into a film is changed into the method of longitudinally cutting the PTFE hollow pipe, then unfolding the cut PTFE hollow pipe into the slices, and calendering the slices into the films through the three-roller calender, so the width spread ratio is reasonably reduced, the consistency of orientation of longitudinal molecules of the films formed through calendering is greatly optimized, and the longitudinal molecule orientation degree and the tensile-strength of the oriented films are improved.