Abstract: In this paper, the effects of different accelerators (U₃O₈, WO₃ and Cr₂O₃) on pyrohydrolysis of LiF were studied. In addition, effects of addition of accelerators, types of accelerators, dosage of accelerators and reaction time on pyrohydrolysis conversion efficiency of LiF were discussed. And solid products were characterized by means of X-ray diffraction (XRD). The results show that when the temperature is set as 650 ℃, the acceleration effects of the three accelerators are in accordance with the following rule: WO₃＞U₃O₈＞Cr₂O₃. Meanwhile, the reaction mechanism is summarized according to the analysis of components of solid products, so as to provide some basic data for the potential application of such accelerators.