本文探讨了γＡｌＦ３的热稳定性和酸性以及活性组分Ｃｒ３＋含量与活性的关系．考察了研制的ＡｌＦ３基催化剂的活性、稳定性及再生性，并对催化剂反应前后的结构进行比较．结果表明，催化剂的强酸中心是ＨＣＦＣ１３３ａ氟化生成ＨＦＣ１３４ａ的活性中心，催化剂晶格的氟离子参与了氟氯交换反应．ＡｌＦ３基催化剂具有高的活性和稳定性，在３５０℃，经２４００ｈ连续运行后，催化剂的晶相结构及比表面积未发生明显的变化．催化剂有较高的热稳定性，在４００℃反应８００ｈ催化剂仍具有一定的活性（３０％）．催化剂结炭失活可在３５０℃通空气或空气与ＨＦ的混合气进行再生 In this paper, the thermal stability and acidity of γAlF3 and the relationship between Cr3 + content and activity of γAlF3 were discussed. The activity, stability and regeneration of the AlF3-based catalyst were investigated. The structures of the catalyst before and after the reaction were also compared. The results show that the strong acid center of the catalyst is the active center of HFC-134a fluorinated by HCFC-133a, and the fluoride ion of the catalyst lattice participates in the fluorine-chlorine exchange reaction. AlF3-based catalyst with high activity and stability, at 350 ℃, after 2400h continuous operation, the catalyst’s crystal phase structure and specific surface area did not change significantly. The catalyst has high thermal stability. The catalyst still has a certain activity (30%) after being reacted at 400 ℃ for 800h. Catalyst deactivation of carbon can be carried out at 350 ℃ air or air and HF mixture regeneration