The invention relates to a method for removing olefins by means of hydrogenation of reformed oil. Active components of a catalyst include at least one of Pt and Pd; an additive is selected from one or two of Sn and Pb; a carrier is Al2O3; noble metals are distributed on the carrier in the form of thin egg shells; the egg shells are 0.05mm to 1mm in thickness; the specific surface area of the catalyst is 50m<2>/g to 400m<2>/g; the pore volume is 0.2cm<3>/g to 1.2cm<3>/g, wherein 50-80 percent of a total pore passage of the catalyst are pores of which the pore diameter is 5nm to 50nm; the content of the active components in percentage by mass is 0.05wt% to 0.5wt%; the content of the additive in percentage by mass is 0.5wt% to 10wt%; the balance is the carrier. According to the method, by using the catalyst, the amount of used noble metals is reduced and the utilization rate of the noble metals is increased; by adding an inorganic metal additive to inhibit the initial activity of the catalyst, poisoning of an operator and environmental pollution caused by organic sulfides can be avoided effectively.