Abstract: The result of a new catalyst for C3 fraction liquid phase selective hydrogenation used in 200 kt/a ethylene unit for 24 months is reported in this paper. The catalyst BC-H-30A allows a wide range of operating conditions, with high activity, high selectivity. It can run at a high liquid space velocity for a long regeneration cycle like BC-L-83 catalyst. Moreover, the catalyst is improved in resisting high concentration of inlet methyl acetylene and propadiene and in the ability of controlling outlet methyl acetylene and propadiene concentration.