Vacuum heating separation is one of the methods for removing insulation oil from pole transformers. In this method, the insulation oil and PCBs are removed from the pole transformers by vaporizing them under vacuum at 200degreesC, and a high removal performance is achieved without pyrolyzing the insulation oil. PCBs and pole transformers. However, it takes a long time to detoxify pole transformers, because they are heated by radiative heat transfer under vacuum. The purpose of this study is to make the vacuum heating separation method more efficient by using a vibration dryer. This new method can reduce not only the treatment time, but also running cost. It was estimated that the heating time could be shortened to 48-50% and the space required reduced to 84-88% in comparison with a conventional plant.