Palladium-carbon is a kind of catalyst, which is made by loading metal palladium powder onto active carbon. Its main role is to catalyze the hydrogenation of unsaturated hydrocarbons or CO. It has the characteristics of high hydrogenation reduction, good selectivity, stable performance, small feeding ratio during use, repeatable application, and easy recovery. Widely used in petrochemical, pharmaceutical industry, electronic industry, fragrance industry, dye industry and other fine chemical hydrogenation reduction refining process.