The　formation　mechanism　of　the　di-vacancy　in　FCC　metal　Pt　has　been　studied　from　the　migration　of　the　two　vacancies　by　using　the　modified　analytical　embedded　atom　method　(MAEAM).　The　lattice　relaxation　resulted　from　the　existence　of　the　vacancies　is　performed　with　the　molecular　dynamics　(MD)　method.　For　migration　of　an　isolated　vacancy　in　Pt,　the　favorable　path　is　the　first-nearest-neighbor　(INN)　migration.　From　the　minimum　formation　energy　or　the　maximum　binding　energy　of　the　di-vacancy,　we　know　that　the　INN　configuration　of　the　di-vacancy　is　the　most　stable.　Up　to　the　fifth-nearest-neighbor　(5NN)　configuration　of　the　di-vacancy,　the　migration　of　the　two　vacancies　is　always　to　approach　each　other　in　the　shortest　paths　of　5NN　-＞　2NN　-＞　1NN,　4NN　-＞　1NN,　3NN　-＞　1NN　and　2NN　-＞　1NN.　(C)　2008　Elsevier　Ltd.　All　rights　reserved.