Abstract: A gold mine is gold oxide ore with Au 3g/t, As 0.86%. The gold recovery was 72.53% by full mud cyanidation process. The highest gold recovery was 74.89% by conventional oxidantion pretreatment -cyanidation leaching process. The gold recovery was 81.97% by using the alkali-cyanide leaching process in the best condition. The alkali-cyanide leaching process can be used as the gold extraction process of the gold oxide ore.