During　selective　laser　melting　additive　manufacture,　due　to　local　high　temperature,　the　material　undergoes　non-uniform　deformation　and　produces　residual　stress,　which　greatly　affects　the　processing　quality　of　the　parts.　A　numerical　model　of　selective　laser　melting　process　is　established　by　means　of　thermo-mechanical　sequential　coupling,　thermo-elastic-plastic　model,　metal　powder-solid　two-phase　transformation,　birth-death　element　and　restart　technology.　Then　the　influence　of　geometric　configuration　on　residual　stress　is　studied.　Compared　with　experimental　results　in　literatures,　the　accuracy　of　the　simulation　algorithm　is　verified.　The　results　show　that　the　residual　stress　increases　with　the　decrease　of　curvature　of　the　parts,　and　the　compressive　residual　stress　mainly　distributes　on　the　inner　and　outer　walls　of　the　parts,　while　the　tensile　residual　stress　mainly　distributes　on　the　area　near　the　middle　diameter　of　the　parts.　With　the　increase　of　the　height　of　the　additive,　the　residual　stress　decreases　first　and　then　increases,　and　gradually　tends　to　be　stable.　©　2021　Journal　of　Mechanical　Engineering.