The smelting waste solution of a gold smeltery contains precious metal ions such as gold and silver.So if the solution is directly discharged,it will be a waste of resources and cause environmental pollution.Therefore,the experiment used metal replacement reduction method to recover gold and silver,compared selective reduction and pre-treatment reduction,and determined optimum treatment method and conditions.The industrial application of pretreatment reduction shows that when smelting waste solution treatment capacity is 600 kg/d,zinc powder consumption is 0.72 kg/d,sodium hydroxide consumption is 2.4 kg/d,reaction time in room temperature is 1.0 h,the gold and silver recovery can be 12.03 g/d and 30.0 g/d respectively.The process has simple flowsheet,no environmental pollution and good operability.