The invention discloses a cutting machine. The cutting machine comprises a base (1), a grinding wheel (2), a movable rod (3), a flute groove (4) and a hand screwing screw (5), wherein the lower end, right opposite to the grinding wheel (2), of the base (1) is provided with a chute; one end of the movable rod (3) extends into the chute to be slidably connected with the base (1); the other end of the movable rod (3) is provided with a threaded hole perpendicular to an axial; the opening of the flute groove (4) is downward and two sidewalls of one end of the scrap blocking groove (4) are symmetrically provided with threaded holes; and one end of the hand screwing screw (5) penetrates through a threaded hole at one side of the flute groove (4), extends into a threaded hole on the end of the movable rod (3) and penetrates out from a threaded hole at the other side of the flute groove (4). When the cutting machine is in actual use, the movable rod (3) can be extended from the base (1) to rotate the flute groove (4) upward and make the flute groove (4) face directly to the grinding wheel (2), so that the generated iron scraps in cutting by the grinding wheel (2) is effectively blocked andprevented from scattering.