Polytetrafluoroethylene extrusion tube is made by mixing polytetrafluoroethylene high-pressure dispersing resin with additives into a paste, extruding it from a compact, and then debinding and sintering it. It can be made opaque and semi transparent according to different needs. Due to its advantages of corrosion resistance, aging resistance, non stick, self-lubricating, and good insulation properties, polytetrafluoroethylene can be used for a long time from -180 ℃ to+260 ℃, and is widely used in chemical, mechanical, electronic, pharmaceutical, aviation and other fields.