Abstract: CG101 highly efficient cyanide-relieving agent is used to remove cyanide from typical cyanide-containing wastewater and tailings in gold industry and is compared with bleaching powder,sodium metabisulfite and hydroperoxide for the effectiveness of cyanide removal.The results show that the CG101 highly efficient cyanide-relieving agent is better than conventional cyanide-relieving agents.It has the advantages including less requirement for reaction conditions,wider application range,higher efficiency,lower cost and no secondary pollution.The application potentials are great and the market is promosing.