In　order　to　further　improve　the　wear　resistance　of　Hypereutectic　High　Chromium　Cast　iron　(HHCCI),　the　effects　of　different　Cu　contents　on　the　microstructure　and　properties　of　HHCCI　were　systematically　studied.　It　was　found　that　with　the　increase　of　Cu　content,　the　carbide　size　was　refined,　and　the　increase　of　Cu　content　led　to　the　increase　of　austenite　and　the　decrease　of　hardness　in　as-cast　HHCCI.　After　heat　treatment　at　1050　degrees　C,　the　hardness　of　HHCCI　increased　significantly　compared　with　as-cast.　And　with　the　increase　of　Cu　content,　the　hardness　of　HHCCI　increased　first　and　then　decreased,　and　the　hardness　was　the　highest　when　0.5　wt%　Cu　was　added.　The　increase　of　copper　content　promotes　the　precipitation　of　secondary　carbides　and　makes　the　interface　between　alpha-Fe　and　M23C6-type　secondary　carbides　a　semi-coherent　boundary.　With　the　increase　of　Cu　content,　the　wear　loss　of　HHCCI　decreased　after　heat　treatment　at　1050　degrees　C,　and　the　wear　resistance　improved.　When　the　Cu　content　increased　to　1.0　wt%,　the　wear　resistance　of　HHCCI　was　the　best,　which　was　2.6　times　that　of　copper-free　HHCCI.　The　continued　increase　of　copper　content　has　no　obvious　effect　on　the　wear　resistance　of　HHCCI.　In　addition,　a　small　amount　of　Cu　tends　to　adsorb　on　the　(0001)　preferential　growth　surface　of　M7C3-type　carbides,　thereby　refining　the　carbides.　From　the　First-principles　calculations,　the　solid　solution　strengthening　effect　of　Cu　on　the　matrix　and　the　adsorption　and　refinement　of　carbides　were　revealed,　and　the　influence　mechanism　on　the　wear　resistance　of　HHCCI　was　characterized.