In　order　to　investigate　the　effect　of　pyrite　on　enargite　leaching,　the　leaching　kinetic　and　electrochemistry　of　enargite　and　pyrite　mixture　by　chemical　leaching　under　the　condition　of　atmospheric　pressure　were　studied.　Leaching　experiments　of　enargite　and　pyrite　mixture　in　H　2　SO　4　-Fe　2　(SO　4　)　3　system　were　investigated　by　leaching　experimental　device.　The　results　show　that　the　activation　energy　of　enargite　is　decreased　to　48.15　kJ/mol,　while　enargite　leaching　is　increased　by　the　addition　of　pyrite.　Enargite　leaching　is　increased　dramatically　up　to　25%　after　12　days　with　the　proportion　of　enargite　to　pyrite　equaled　to　1:6.　The　morphological　changes　of　sulfur　and　arsenic　of　mixture　before　and　after　leaching　were　demonstrated　by　XPS.　Arsenic　is　promoted　to　transfer　to　pentavalent　arsenic,　which　means　less　toxic.　The　rest　potential　of　enargite　is　detected　to　0.48　V　by　the　electrochemical　workstation.　Electrochemical　behavior　explains　the　galvanic　effect　of　chemical　leaching　of　enargite　and　pyrite　mixture,　which　promotes　the　dissolution　of　enargite.　©　2018,　Science　Press.　All　right　reserved.