The invention discloses an electrochemical corrosion based preparation method for a silicon nanoribbon and relates to a silicon nanoribbon. The electrochemical corrosion based preparation method comprises the steps: cutting a P-doped silicon wafer into a square, and sputtering a copper electrode on the back of the silicon wafer; placing the silicon wafer into an electrochemical corrosion tank; preparing an electrolyte; respectively connecting a back electrode of the silicon wafer to the anode of a power source and the electrolyte to the cathode of the power source to carry out electrochemical corrosion and silicon nanoribbon stripping; and flushing the obtained silicon wafer, and carrying out drying to obtain the silicon nanoribbon. A two-dimensional material of the silicon nanoribbon, which is novel in structure as well as uniform and ordered in distribution, is prepared creatively, and the adopted electrochemical corrosion method is a novel method which is simple and low in cost.