In　the　welding　process　of　ultra-thin　metal　plates,　the　control　of　welding　residual　stress　and　deformation　has　an　important　influence　on　the　product　quality.　The　residual　stress　and　welding　deformation　of　316　stainless　steel　ultra-thin　plate　(thickness　70　μm)　during　pulse　laser　welding　process　were　studied.　The　thermo-elastic-plastic　finite　element　method　and　the　semi-ellipsoid　moving　heat　source　model　were　used　to　simulate　the　temperature　field　and　stress-strain　field　of　the　ultra-thin　plate　structure　by　considering　the　geometry　and　material　nonlinear　factors　of　the　model.　A　pulsed　laser　welding　experiment　was　carried　out,　the　temperature　was　measured　using　an　infrared　thermometer,　the　welding　distortion　was　measured　by　a　laser　displacement　sensor,　and　the　residual　stress　was　measured　by　an　X-ray　diffraction　stress　tester.　The　results　shown　that　the　model　prediction　were　consistent　with　the　experimental　measurements　results.　©　2019,　Editorial　Board　of　Transactions　of　the　China　Welding　Institution,　Magazine　Agency　Welding.　All　right　reserved.