The utility model provides a polytetrafluoroethylene is forming device in advance, a serial communication port, include: a shaping section of thick bamboo holds the polytetrafluoroethylene granule asthe mould, interior core bar is placed in a shaping section of thick bamboo, the piston is with the internal diameter phase -match of a shaping section of thick bamboo to with the lower extreme fixedconnection of interior core bar, core bar in being used for supporting, polytetrafluoroethylene blowing funnel erects on a shaping section of thick bamboo, the tamponade, be cylindric, the core bar passed in central point put and supplies through -hole, the tamponade is used for placing in a shaping section of thick bamboo after reinforced to push down the polytetrafluoroethylene granule in the shaping section of thick bamboo, and oscillation unit for drive the vibration of polytetrafluoroethylene blowing funnel, wherein, oscillation unit includes support, shaking table and vibrating motor, and the support is placed subaerial, and the shaking table passes through spring coupling on the support, and vibrating motor sets up on the shaking table, is used for driving the shaking table and vibrates.