Manganeseoreisanimportantandbasicindustrialrawmineralinindustry.Withthedemandfor manganese ore expanding in domestic market，the production of domestic manganese ore becomes more andmoredif iculttomeettherequirements.Atpresentfewcountries dominatetheinternationalmarket pricing，howtograspthemanganeseorepricingpowerintheinternationalmarketis ofgreatsignificance toChina. BasedonRDEmodel，thispaperfirstlymadesomefurtherexpansiononmeasurementmodelof marketpower，andthendidanempirical analysis aboutthetradeof manganeseorebothinChina and Australia.Thispaperfinallyfoundoutthattheelasticityofresidualdemandandtheelasticityof supply demand are two core factors which affected the market power.