▎ 摘　　要

NOVELTY - Preparing aluminum fluoride/wave absorbing material composite catalyst comprises ball milling and mixing and roasting aluminum fluoride and wave absorbing material. USE - The aluminum fluoride/wave absorbing material composite catalyst is useful in fluorine-chlorine exchange reaction of chloroform and fluoalkane (claimed). ADVANTAGE - The method: improves the conversion rate of the raw material and the stability of the catalyst. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: composite catalyst of aluminum fluoride/wave absorbing material, is prepared by the above preparation method; aluminum fluoride/wave absorbing material composite catalyst, is obtained by the above method; and recycling trifluoromethane, comprising using chloroform and trifluoromethane as raw material, converting by fluorine and chlorine exchange reaction.