The invention relates to an acetylene removal method in a front-end depropanization front-end hydrogenation process. The acetylene removal method is characterized in that a hydrogenation catalyst is a Ti-Fe-Ni selective hydrogenation catalyst, and a carrier is high temperature-resistant inorganic oxide; calculated by 100 percent by weight of catalyst, the catalyst contains 5-15 percent of Fe, 0.2-1.5 percent of Ti and 0.5-1.8 percent of Ni; the specific surface of the catalyst is 10-300 m<2>/g; the pore volume is 0.2-0.65 ml/g; the Fe is loaded on the carrier in an impregnating manner, is prepared by roasting and hydrogen atmosphere reduction, mainly exists in a form of alpha-Fe2O3 and contains a NiTi phase. With the adoption of the acetylene removal method provided by the invention, the catalyst is moderate in reaction activity, good in operational flexibility, good in ethylene selectivity and much lower than a noble metal catalyst in production amount of green oil.