Recent　investigations　suggest　that　the　addition　of　trace　Re　element　has　a　significant　influence　(the　so-called　Re　effect)　on　the　mechanical　properties　of　Ni-based　single　crystal　superalloys.　Nevertheless,　the　mechanisms　for　this　Re-effect　at　different　service　temperatures　are　still　unclear.　The　present　work　studied　the　elastoplastic　deformation　behavior　of　the　gamma　phase　in　Ni-based　single　crystal　superalloys　by　molecular　dynamics,　with　the　emphasis　on　Re-associated　mechanisms　at　a　wide　range　of　Re　contents　(from　0　at.%　to　9　at.%)　and　temperatures　(from　300　K　to　1100　K).　The　results　indicate　that　the　Re　content　and　temperature　have　an　obvious　effect　on　the　elastic　modulus　of　the　gamma　phase,　the　higher　the　Re　content　and　temperature,　the　lower　the　elastic　modulus.　The　yield　stress　and　strain　decrease　with　the　increase　of　Re　content　and　temperature.　Both　the　temperature　and　Re　content　affect　the　formation　and　propagation　of　dislocations,　which　further　leads　to　a　correlation　between　the　evolution　of　dislocations　and　stress-strain.　In　addition,　the　effects　of　size　and　strain　rate　on　elastoplastic　behavior　are　also　studied.