Round steel pipe cutting device

The invention relates to a cutting device, in particular to a round steel pipe cutting device. The round steel pipe cutting device which can be used for fixing and cutting steel pipes with different diameters, is high in precision of the cutting lengths of the steel pipes, and is high in cutting efficiency is provided. The invention provides such a round steel pipe cutting device, which comprisesa baseplate, a collecting frame, a mounting plate, a clamping mechanism, a cutting mechanism, and a sector gear, wherein the baseplate is used for mounting the whole device; the collecting frame is arranged on one side of the top of the baseplate; the mounting plate is arranged in the middle of the top of the baseplate; the clamping mechanism is arranged on the mounting plate; the cutting mechanism is arranged in the middle of the mounting plate; and the sector gear is arranged on the clamping mechanism. By the cooperation of a driving disc and an L-shaped rotating rod, when the right end of the L-shaped rotating rod