Decyanation treatment system for electroplating cyanide-containing wastewater

The utility model discloses a decyanation treatment system for electroplating cyanide-containing wastewater, and solves the technical problems that the introduction amount of carnallite is large and toxic gas is generated in the prior art. The electroplating cyanide-containing wastewater decyanation treatment system comprises a first decyanation unit used for oxidizing and removing cyanide in electroplating cyanide-containing wastewater and outputting a primary reactant; the first cyanogen removal unit comprises a first-stage reaction tank and first dosing equipment for adding an oxidizing agent into the first-stage reaction tank; the second cyanogen removal unit is used for precipitating out cyanide in the first-stage reactant and outputting a second-stage reactant; the second cyanogen removal unit comprises a second-stage reaction tank, second dosing equipment for adding a first pH regulator into the second-stage reaction tank and third dosing equipment for adding a precipitator into the second-stage reacti