A new cyanide-free desorbent C was studied and developed because of NaCN addition,the cyanide pollution and poor gold and silver desorption rate in the high temperature and high pressure desorption electrolysis process for dealing with gold-loaded carbon with low gold but high copper and silver content.The results of industrial production application show that during the high temperature and high pressure desorption electrolysis process,the use of a combined additive composed of NaOH with mass fraction 2 % and a new cyanide-free desorption desorbent C with mass fraction 0.10 % eliminates cyanide pollution and can improve the desorption rate of gold and silver,which can reach 98.99 % and 97.60 % respectively.Compared to the addition of a single NaOH desorption electrolysis process,the average index of gold and silver desorption rate has increased by 3.85 and 6.13 percentage points respectively.The cumulative new direct economic benefits of 2 710 600 yuan were obtained.It has achieved better economic and social benefits.