A hydrogen sulfide removing device is disclosed. The device includes a container the inside of which is an enclosed space. The container is communicated with a gas feeding pipe and a gas discharging pipe. The container is filled with iron scraps having a temperature of 180-220 DEG C. Gas containing hydrogen sulfide is fed into the container through the gas feeding pipe and passes through the ironscraps, and a reaction that is represented by Fe + H2S = FeS + H2 occurs. The gas passing through the iron scraps is discharged from the gas discharging pipe. The gas containing hydrogen sulfide is fed into the container filled with the iron scraps, and the hydrogen sulfide and the high-temperature iron scraps are chemically reacted to remove the hydrogen sulfide from the gas. The method is high in efficiency, low in pollution, low in cost, simple to operate and convenient to operate when the method is adopted for hydrogen sulfide removing.