Abstract: The earthy copper deposits distribute in the weathered crusts of Luoxue Formation of Kunyang Group of Pt 2 in the middle area of Yunnan Province.They are consitdered as unused ones for a long time because of the lower benefit by the traditional dressing methods.With the development of the hydrometallurgical technology,they could be used now.The ore deposit geological characters and the hydrometallurgical technology gradually become the important researched projects.