The invention provides an automatic untwisting scutcher. The automatic untwisting scutcher comprises a plurality of rolling shafts, a scutching cutter, an image acquisition unit, an analysis unit and an adjusting unit, wherein the plurality of rolling shafts are arrayed in sequence from top to bottom; cloth sleeves the rolling shafts and moves along the rotation of the rolling shafts; the scutching cutter is arranged at the lower part of the rolling shaft at the lowest end and is vertical to the axial direction of the rolling shaft; the image acquisition unit is used for acquiring a cloth image of the cloth; the analysis unit is connected with the image acquisition unit and is used for analyzing whether deviation occurs or not in a process of cutting the cloth by the scutching cutter according to a standard line in the cloth image; the adjusting unit is connected with the rolling shafts and the analysis unit and is used for adjusting the positions of the rolling shafts; and when the analysis unit judges that the deviation occurs in the process of cutting the cloth by the scutching cutter, the adjusting unit is used for adjusting the positions of the rolling shafts, so that the standard line of the cloth is aligned to the scutching cutter. The scutcher provided by the invention has relatively high efficiency and relatively good performance, and the manual cost is greatly saved.