Method of slicing ingot

A method of slicing ingot is provided. The method of slicing ingot sequentially includes a cutting step, a broken wire rescue step, and a continuous cutting step. In the cutting step, a cutting line is movably wound around a plurality of rollers at a predetermined speed value, at the same time, an ingot is moved along a cutting direction at a preset speed value to allow the cutting line to cut the ingot. In the broken wire rescue step, a continuous cutting line is movably wound around the plurality of rollers in a manner that the predetermined speed value first drops and then rises, at the same time, the ingot is moved along the cutting direction in a manner that the preset speed value first drops and then rises to allow the continuous cutting line to cut the ingot. In the continuous cutting step, the continuous cutting line is movably wound around the plurality of rollers while maintaining the predetermined speed value, at the same time, the ingot is maintained at the preset speed value to move along the cut