The invention discloses a method for separating hydrogen sulfide from sewage, relates to the field of environmental engineering and chemical engineering, and in particular relates to a method for separating hydrogen sulfide from sewage in oil and gas fields by using an emulsion liquid membrane. The method for separating the hydrogen sulfide from the sewage comprises three steps, namely preparation of emulsion liquid, sewage desulfurization and separation of the emulsion liquid and the sewage. By adopting the method disclosed by the invention, treatment process equipment is simple, and only are a stirrer and a separator needed; the hydrogen sulfide separation speed is high, short time is consumed, and only is half an hour needed in each separation process; 'inverse concentration gradient' can be realized in the separation process, so that the separation efficiency is higher; the separation process can realize reuse of materials, so that the treatment cost can be effectively saved.