Abstract:This paper summarized that the latest developments of Ocean Cobalt-rich Crust, briefly discussing several processing methods of polymetallic nodules at home and abroad. In addition,the principle,processes and effects of treatment were systematically analyzed of activating sulfuric acid leaching,activating hydrochloric acid leaching,pyrometallurgical concentration of valuable metals,tri-phase oxidizing to enrich and separate valuable metals,reductive ammonia leaching,slurry electrolysis leaching and bio-leaching,and summarized the characteristics of ocean cobalt-rich crust processing.