Although copper sulfate (CuSO4) as a valuable desulfurizer is commonly used in the laboratory, it is not applied in industry due to its high cost and lack of practical regeneration method. In this study, a method for regeneration of the absorption product copper sulfide (CuS) under mild conditions is put forward. In the presence of sodium chloride (NaCl), CuSO4 could be regenerated smoothly in acid solution and be recycled for the absorption of hydrogen sulfide (H2S). Specifically, under the conditions of 0.30mol/L chloride ion (Cl.), 1.8% acidity at 323 K, for 5.5 h, the regeneration efficiency will be higher than 99%. Moreover, extensive experimental studies showed that the addition of Cl. would not observably influence the absorption efficiency of H2S. These results reveal the potential for developing a novel, efficient and low-cost desulfurization technology.