Abstract: Based on the property of a carbonaceous arsenious gold ore from Laos， the paper has explored the process of CIP leaching， run-of-mill ore roasting-roasting slag leaching， flotation-flotation concentrate roasting-roasting slag leaching， flotation carbon concentrate decarburizing roasting-bio-oxidation-leaching. The results show that compared to the other 3 processes， the flotation-flotation concentrate roasting-roasting slag leaching joint process is more suitable for the ore. Under test conditions， the gold recovery rate of flotation concentrate is 95.16 %， the gold leaching rate of roasting slag leaching is 88.60 %， the gold total recovery rate of overall flow sheet is 84.31 %.