The invention relates to a catalyst for ethane alkylation reaction and aims at mainly solving the problem that the conversion ratio of ethane is low when a Pt-supported molecular sieve catalyst is used for benzene and ethane alkylation reaction. According to the technical scheme of the invention, the catalyst for the ethane alkylation reaction provided by the invention comprises the following components: (a) Pt or an oxide thereof; (b) an oxide of Zn; (c) a simple substance or an oxide of a La-series element; (d) a molecular sieve, so that the catalyst relatively well solves the technical problems and can be used for benzene and ethane alkylation reaction.