The present invention relates to a fume pipe perforator, conventionally, because the perforated hume pipe was drilled to connect a small diameter sewage cup to the fume pipe, it takes a lot of time, and the defects around the perforated part of the fume pipe irregularly.;The present invention combines the upper frame (2) and the settle frame (3) to the upper and lower ends of the support frame (1) as shown in Figure 5, respectively, and the cutter (5) rotated by the hydraulic motor (4) inside ), The hydraulic motor (4) is coupled to the connecting piece (6) to install the handle (8) and screw rod (9) so that the connecting piece (6) is elevated on the guide rod (7).
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