Slitting machine cutter and slitting machine cutting device

The invention relates to a slitting machine cutter and a slitting machine cutting device. The slitting machine cutter comprises a cutting knife, a cutting knife fixing seat, a position clamping mechanism and a fixing mechanism. The position clamping mechanism is hinged to the cutting knife fixing seat, when the position clamping mechanism rotates, and the position clamping mechanism is matched with the cutting knife fixing seat to form an installation hole for being installed and fixed to a knife rack; the fixing mechanism comprises a rotating rod, a limiting piece, a spring and a compressingpiece, wherein the rotating rod is hinged to the cutting knife fixing seat, the limiting piece, the spring and the compressing piece all sleeve the rotating rod, and the spring are located between thelimiting piece and the compressing piece; a positioning groove with openings in the two sides are arranged at the second end of the position clamping mechanism, when the second end is close to the cutting knife fixing seat, t