Sectional material feeding method, sectional material feeding device and pipe cutting machine

The invention provides a sectional material feeding method, a sectional material feeding device and a pipe cutting machine. The sectional material feeding method comprises the following steps that a controller records stacking information of different sectional materials located in a material frame; and the moving assembly sequentially moves the profiles located in the material frame to the target position at least in a magnetic attraction mode according to the stacking information. The stacking information of different profiles in the material frame is recorded through the controller; and the moving assembly sequentially moves the sectional materials located in the material frame to the target position at least in a magnetic attraction mode according to the stacking information, and therefore feeding of the sectional materials is achieved. And the moving assembly sequentially loads the profiles according to the stacking information, recorded by the controller, of the profiles, the automation degree of loadin