Spiral welded pipe cutting machine

The invention discloses a spiral welded pipe cutting machine which comprises an installation support, a longitudinal sliding supporting plate is installed on the installation support in a sliding mode, the longitudinal sliding supporting plate is driven by a longitudinal power device to move on the installation support in a reciprocating mode, and a saw cutting device capable of moving in a lifting mode and cutting a spiral welded pipe is arranged below the longitudinal sliding supporting plate. A clamping base is installed above the longitudinal sliding supporting plate, a first clamping jaw and a second clamping jaw which are used for rotationally clamping the spiral welded pipe are hinged to the clamping base, and the first clamping jaw and the second clamping jaw are connected through a clamping power device to drive opening and closing. The cutting machine can synchronously advance along with a spiral welded pipe and cut the spiral welded pipe, ensures that a cutting opening is accurate and flat in shape