The experiment was performed using yacon as the raw materials to study the processing technology of dried yacon slices，which were treated with cleaning，slicing，blanching，color protecting，drying，oftening and so on. The result indicated that the optimum formula of color fixative was 0.15% sodium sulfite，0.20% citric acid and 0.15% ascorbic acid. This product with bright yellow，smooth taste，compact structure is of finer quality