Method used for selective high-efficiency extraction of copper and bismuth from high-copper bismuth slag

The invention discloses a method used for selective high-efficiency extraction of copper and bismuth from high-copper bismuth slag. According to the method, high-copper bismuth slag is taken as a raw material; high-copper bismuth slag powder obtained via smashing, grinding, and sieving and a sulfuric acid solution are subjected to size mixing at a certain ratio, and are delivered into a high-pressure autoclave; rich oxygen is introduced into the high-pressure autoclave, and oxygen pressure in the high-pressure autoclave is controlled for oxidizing leaching, wherein in the oxidizing leaching process, leaching of Cu in the form of Cu2+ is realized, and selective separation of copper with other non-zero valent elements is realized; a copper-containing leachate is subjected to acid adjusting, and is subjected to rotational flow electrolysis directly so as to extract copper in the copper-containing leachate and obtain copper products; a leaching residue is subjected to leaching separation of bismuth with concentra