▎ 摘　　要

NOVELTY - Preparaing chloroethylene comprises using ethylene, hydrogen chloride and oxygen prepared into chloroethylene in a reactor under the action of a composite catalyst, where the composite catalyst comprises a catalyst A and a catalyst B. The catalyst A is an ethylene oxychlorination catalyst and catalyst B is a catalyst with functions of dichloroethane dehydrochlorination and ethylene oxychlorination, preferably, catalyst B comprises a carbon-based catalyst and/or an alumina-supported metal catalyst. The carbon-based catalyst comprises a pure carbon-based catalyst of a carbon material or metal-loaded carbon-based catalyst and/or a non-metal-loaded carbon-based catalyst or a carbon-based catalyst supporting a metal and a non-metal, more preferably, catalyst B is a carbon-based catalyst. USE - The method is useful for preparaing chloroethylene.