According　to　the　specific　characteristic　of　multi-metal　mine,　the　function　models　of　metal　production,　gross　profit,　net　present　value,　rate　of　return　on　investment　were　obtained.　Then　the　multi-objective　optimization　of　ore　grade　index　was　achieved　under　constraints.　The　model　was　calculation　based　on　the　method　of　improved　particle　swarm　optimization　(IPSO).　In　the　5　years＇　evaluation,　the　new　index　scheme　can　increase　total　profit　about　45.25　million　yuan,　total　amount　of　metal　mines　about　23,214　tonnes,　net　present　value　about　26.29　million　yuan　and　the　rate　of　return　on　investment　about　11.25%.