The invention discloses a cutting device capable of fixing hardware conveniently. The device comprises a box, a first sliding groove is formed in the lower surface of the inner wall of the box, the left side face and the right side face of the first sliding groove are fixedly connected with the left end and the right end of a sliding rod, a sliding sleeve is connected to the outer surface of the sliding rod in a sleeving mode, the upper surface of the sliding sleeve is fixedly connected with the lower surface of a fixed block, a toothed bar is fixedly connected to the upper surface of the fixed block, and the right side face of the toothed bar is fixedly connected with the left side face of a first clamp block. According to the cutting device capable of fixing the hardware conveniently, byarranging the first sliding groove, the sliding rod, the sliding sleeve, the fixed block, the toothed bar, a gear, a first motor, a first support column, the first clamp block, a second clamp block,an electric push rod and a control panel which cooperate with one another, to-be-cut hardware achieves the ideal fixing effect; therefore, the hardware can be fixed and disassembled by controlling thefirst motor and the electric push rod to work by workers through the control panel, and the working efficiency of the workers is improved.