The invention relates to a cutting device, in particular to a stable quantitative cutting device for electric wires of electric power. According to the stable quantitative cutting device for the electric wires of the electric power, the cutting surface is flat, the cutting efficiency is high, and the cutting length can be quantitatively selected. The stable quantitative cutting device for the electric wires of the electric power comprises a support and the like. A graduated scale is arranged in the middle of the left wall of the support, a rotating device is arranged on the right side of the top of the support, a cutting device is arranged on the left wall in the support, and a collection frame is arranged on the right side of the bottom in the support and is located on the right side of the cutting device. According to the stable quantitative cutting device for the electric wires of the electric power, the effects that the cutting surface is flat, the cutting efficiency is high, and the cutting length can be quantitatively selected can be achieved. By arranging the graduated scale, the cutting length of the electric wires can be accurately measured.