Abstract: Experimental research was conducted on pressure oxidation-cyanide leaching for gold recovery from purchased waste circuit boards,investigating the effects of material fineness,material mass fraction,oxidation temperature,oxidation time,etc.,on the effectiveness of pressure oxidation pretreatment.The experimental results showed that conducting pressure oxidation pretreatment under conditions of material fineness of -0.25 mm accounting for 80 %,material mass fraction of 30 %,oxygen partial pressure of 2.0 MPa,oxidation temperature of 200 °C,oxidation time of 3.0 h,sulfuric acid dosage of 90 kg/t,and oxidant dosage of 25 kg/t,followed by cyanide leaching under appropriate conditions,resulted in an average gold leaching rate of 92.52 %.