The utility model provides a polytetrafluoroethylene blowing funnel, a serial communication port, include: the funnel body, the funnel that has the back taper is personally experienced sth. Part of the body to and the filler tube of connection at funnel body lower extreme, the spacing ring sets up in the filler tube, along the axial extension of filler tube, the connection piece is along the radial extension of filler tube, respectively with the inner wall of filler tube and the outer wall fixed connection of spacing ring, at least one partition wall, set up internal at the funnel, lower extreme and connection piece fixed connection, two at least block separation boards set up between the outermost partition wall and the funnel body, along the radial extension of the funnel body, and handle board, upper end fixed connection with the partition wall of inlayer has spacing hole, handle aperture and drain hole, and wherein, a plurality of blowing spaces are separated into with the funnel is internal to a plurality of partition walls, and the division board becomes a plurality of sub - blowing spaces with outermost blowing space separation. The utility model also provides an including the polytetrafluoroethylene of above -mentioned polytetrafluoroethylene blowing funnel forming device in advance.