The invention discloses a method for recycling valuable metals in a peracid waste fluid produced during a copper anode mud treating process. The method mainly comprises the following steps: (1), selectively absorbing rare and precious metals such as gold, silver, platinum, palladium and the like; (2), carrying out diffusing and dialysis separation for recovering acid; (3), neutralizing and hydrolyzing to recover bismuth oxide chloride; (4), separating copper from arsenic to recover copper; (5), efficiently vulcanizing and deeply removing arsenic; (6), recovering metals such as zinc, nickel, tin and the like through a neutralization method; and (7), after neutralization, adopting multiple-effect evaporation for recovering salt from high salinity wastewater. The method provided by the invention achieves efficient separation and deep recycling to rare and precious metals, base metals, arsenic and acid, and achieves recycling of valuable elements and elimination of the harmful element arsenic, the running cost is saved, and the environment risk is lowered.