In　this　study,　a　Hastelloy　X　alloy　single　track　was　manufactured　by　means　of　selective　laser　melting.　The　transient　temperature　field　and　cooling　rate　characteristics　of　single　tracks　in　the　manufacturing　process　were　simulated　using　the　ABAQUS　software.　The　cross-comprehensive　effects　of　the　scanning　speed　and　power　of　the　selective　laser　melting　process　on　the　surface　morphology,　geometric　characteristics,　wetting　and　spreadability　of　single　tracks　were　analyzed.　The　results　indicated　that　the　transient　peak　temperature　and　average　cooling　rate　decreased　with　the　increase　in　scanning　speed,　but　increased　with　the　increase　in　laser　power.　At　the　same　time,　the　height　and　width　of　the　single　track　gradually　increased　in　conjunction　with　the　laser　power　and　decreased　with　increased　scanning　speed.　A　two-factor　variance　analysis　indicated　that　the　contribution　rates　of　laser　power　and　scanning　speed　to　the　geometric　size　of　the　single　tracks　were　89.02%　and　10.25%,　respectively.　Therefore,　optimization　of　the　laser＇s　power　control　exerts　a　higher　process　effect　on　single　track　formation　quality.