Styrene is an important monomer of synthetic resin, ion exchange resin, and synthetic rubber in the polymerization industry. However, a small amount of benzene acetylene is often present in styrene raw materials. Benzene acetylene is toxic to the polymerization catalyst, and the maximum acceptable limit is not more than 10ppm . Therefore, the removal of benzene acetylene in styrene raw materials is very important. At present, benzene acetylene impurities are mainly removed by selective hydrogenation to styrene in industry, but it is necessary to prevent the overhydrogenation of benzene acetylene to ethylbenzene at the same time. Therefore, the selective hydrogenation of benzene acetylene to olefin has very important practical significance .