▎ 摘　　要

NOVELTY - Photocatalytic selective metal dissolving agent comprises cyanide compound solution containing a photocatalyst, where the water content in the solution is 0-50 wt.%, and the content of the photocatalyst in the solution is 0.01-50 mg/ml. USE - Used as photocatalytic selective metal dissolving agent. ADVANTAGE - The agent breaks through the existing cognition of the noble metal selective dissolving process; ensures the evolution of metal in the environment and metal extraction or metal separation and purification treatment having directive significance. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for use method of the photocatalytic selective metal dissolving agent comprising dispersing the metal material into the photocatalytic selective metal dissolving agent, and irradiating light for a certain period of time to selectively dissolve each metal in the metal material.