Online pipe cutting machine

The invention discloses an online pipe cutting machine, and relates to the technical field of pipe cutting. The online pipe cutting machine comprises a working table, a tracking device and a cutting device; the working table is arranged on a driven mechanism in a sliding manner in the first preset direction, the working table is arranged on a lead screw driving mechanism, and the lead screw driving mechanism drives the working table to do reciprocating motion in the first preset direction; the cutting device comprises a cutting mechanism, a pipe clamping mechanism and a cut pipe feeding mechanism, the cut pipe feeding mechanism comprises a cutting table, a feeding table and a crank connecting rod driving part, and a cutting mechanism is arranged on the cutting table; and the crank connecting rod driving part is in transmission connection with the cutting table and is arranged to enable the cutting table to do reciprocating motion in the second preset direction through rotation motion so as to get close to the