The invention relates to an acetylene removal method in front-end depropanization and front-end hydrogenation. The acetylene removal method is characterized in that a hydrogenating raw material comprises the following components in volume ratio: 30-40 percent of methane, 15-25 percent of hydrogen, 8-15 percent of ethane, 30-45 percent of ethylene, 5-10 percent of propane, 5-10 percent of propylene, 0.1-0.5 percent of propadiene, 0.5-1.0 percent of acetylene and 0.1-0.5 percent of propyne. Reaction conditions are that the first-section inlet temperature is 50-100 DEG C, the second-section inlet temperature is 50-100 DEG C, the third-section inlet temperature is 50-100 DEG C, the reaction pressure is 1.5-4.0 MPa, and the reaction volume airspeed is 10000-20000 h<-1>. A hydrogenation catalyst is a Fe system selective hydrogenation catalyst, and a carrier is high-temperature resistant inorganic oxide. 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.