Abstract: In the new system of indirect electrolytic hydrogen sulfide, EDTA-Fe (Ⅲ) absorption liquid was used to absorb hydrogen sulfide, and the reaction absorption liquid was electrolytically regenerated. The effects of absorbent mass fraction, hydrogen sulfide molar fraction, and pH value of absorption liquid on the desulfurization rate, the effects of different electrodes on the electrolytic regeneration reaction, and the current efficiency of during cathode and anode regeneration were investigated. The results showed that at the absorption phase, the desulfurization rate increased with the raising of the content of hydrogen sulfide and the pH value of the absorption solution. At the electrolysis stage, when the electrolytic potential of EDTA-Fe (Ⅱ) was greater than -0.2 V vs SCE, the oxidation current rose rapidly with the increase of the electrode potential. Under the electrolytic regeneration system of graphite electrodes, the current efficiency of the anode reaction of EDTA-Fe(Ⅱ) to EDTA-Fe(Ⅲ) increased with the increase of electrode potential, and the cathode was high-purity hydrogen. The new system combines high absorption rate of hydrogen sulfide by wet absorption with recovering the hydrogen resources during the regeneration of the absorption liquid. It has the dual effects of hydrogen sulfide pollution treatment and high resource recovery rate.