Laser tube cutting machine capable of achieving positioning cutting

The invention relates to a laser tube cutting machine capable of achieving positioning cutting, which comprises a cutting machine frame, a cutting head mounted at the top of the cutting machine frame and a groove formed in the top of the cutting machine frame, wherein when a pipeline penetrates through one side of the interior of a limiting clamping ring to move and cut, a printing ring prints scales on the outer surface of the pipeline. One end of the pipeline is fixed through an arranged fixing chuck, when the fixing chuck moves in the direction of a sliding rod, a connecting rod fixed to one side can be pushed to move, the connecting rod pushes a cleaning scraper to scrape chippings generated after the interior of a groove is cut, and the two sides of the cleaning scraper are both provided with tool faces; when the fixing chuck pushes the cleaning scraper to move towards one side, primary scraping is carried out, and when the cleaning scraper moves back, secondary scraping can be carried out again, so that