By　single　addition　of　Nd　or　Sr,　and　combined　addition　of　Nd　and　Sr　into　Mg-6Al　matrix　alloys,　heat-resistant　Mg-6Al-6Nd,　Mg-6Al-2Sr　and　Mg-6Al-2Sr-2Nd　were　obtained　by　water　cooled　technology,　respectively.　The　microstructures　and　creep　properties　of　water-cooled　Mg-6Al-2Sr-2Nd　alloys　were　analyzed　and　compared　to　reveal　the　effects　of　addition　means.　The　results　show　that　when　the　Nd　and　Sr　elements　are　added　into　the　Mg-6Al　matrix　alloy　together,　there　occur　the　complicated　compound　named　Al4(Sr,　Nd)　with　part　Sr　substituted　by　Nd　and　the　complicated　compound　named　Al11(Nd,　Sr)3　with　part　Nd　substituted　by　Sr　precipitate　besides　the　compound　Al11Nd3　and　Al2Nd　formed　in　the　Mg-6Al-6Nd　alloy　and　Al4Sr　formed　in　the　Mg-6Al-2Sr　alloy.　In　the　Mg-6Al-2Sr　alloy,　the　addition　of　2%Nd　not　only　refines　its　grains　and　dendrite　spacing　but　also　improves　the　distribution　density　of　all　precipitates,　which　leads　to　the　stronger　interaction　between　the　dislocation　and　precipitates　in　the　creep　process　and　improves　its　creep　properties.