Gold extraction technology-"a process of extracting gold and silver from waste circuit board chips and integrated blocks" is a patent technology certificate issued by China National Intellectual Property Administration. Using the environmental protection gold extraction technology invented by Jin Xin, a set of practical gold extraction technology from various waste circuit boards and electronic wastes was researched and innovated. Gold, silver, platinum, palladium, copper, tin and other metals can be recovered from waste circuit boards and electronic wastes containing trace precious metals, and the recovered metals can meet the national standards. Mainly environmental protection and pollution-free, so that waste resources can be regenerated and turned into treasure.