Abstract: The paper introduces a new non-cyanide silver leaching method by using Ammonium Persulfate ((NH₄)₂S₂O₈) as oxidant and Sodium Chloride (NaCl) as a complexing agent.Some conditioning tests with the concentration of (NH₄)₂S₂O₈ and NaCl，leaching temperature and time，pH value，and the mixing strength in the leaching process were made.The experimental results showed that the leaching rate of silver in silver powder reached more than 95% under conditions of 0.225% of (NH₄)₂S₂O₈，25% of NaCl，leaching temperature at 45 ℃，and stirring speed at 675 r/min for 6 h.

Key words: Silver, Leaching, (NH₄)₂S₂O₈, NaCl