The invention relates to the field of cloth cutting process and discloses a cloth cutting machine. The machine comprises a machine bench; a cutting seam and a support are provided on the machine bench; the support is rotationally connected with a cam and a lever; one end of the lever is hinged to a push rod; the push rod is abutted to the cam; a first abut foot and a second abut foot are hinged toa lower end of the push rod; springs are connected between the first abut foot and the push rod and the second abut foot and the push rod; a tooth bar is hinged to the other end of the lever; a straight gear is engaged to the tooth bar; the straight gear is fixedly connected with a first bevel gear; the diameter of the first bevel gear is larger than that of the straight gear; the first bevel gear is engaged with a second bevel gear; the second bevel gear is engaged with a third bevel gear; the third bevel gear is engaged with a fourth bevel gear; a leading screw is fixedly connected to the fourth bevel gear; the leading screw is sleeved by a cooperative sliding sleeve; the sliding sleeve is slidingly connected to the machine bench; a vertical rod is fixedly connected to the sliding sleeve; a cutter is connected to the vertical rod. The invention can automatically cut the cloth straight to ensure that the slit is straight.