The　deformation　and　residual　stress　directly　affected　the　appearance　and　mechanical　properties　of　components.　It　is　inevitable　to　produce　large　deformation　and　stress　in　the　metal　forming　process.　In　this　paper,　the　deformation　of　fused-coating　additive　manufacturing　was　investigated　with　finite　element　(FE)　simulations.　And　Goldak＇s　double　ellipsoidal　heat　source　model　is　implemented　into　the　numerical　model.　The　FE　model　of　the　deposition　layer　was　developed　on　the　basis　of　experimental　observations.　Temperature　field　distribution　of　fused-coating　process　was　firstly　calculated　and　analyzed.　These　results　were　then　input　the　thermal　elastic-plastic　FE　models　and　the　deformation　and　stress　could　be　obtained.　The　process　parameters　and　constraint　conditions　were　shown　to　have　considerable　effect　on　the　deformation　and　stress.