During　the　wire-arc　additive　manufacturing,　the　thermal　and　stress　evolution　inside　the　as-deposited　parts　has　an　important　influence　on　the　quality　of　the　parts.　Temperature　and　stress　characteristics　of　2Cr13　thin-wall　parts,　with　interlayer　idle　time　of　30,　120,　210　and　300　s　was　simulated　using　the　three-dimensional　finite　element　model.　The　simulation　results　have　a　good　agreement　with　the　corresponding　experimental　results.　The　results　indicated　that　longitudinal　residual　stress　distribution　of　the　buildup　with　30　s　interlayer　idle　time　are　significantly　different　from　those　of　deposits　with　other　interlayer　idle　time.　When　the　interlayer　idle　time　is　longer　than　210　s,　the　further　increase　of　the　interlayer　idle　time　can　hardly　reduce　the　stress.　Consequently　the　interlayer　idle　time　of　the　wire-arc　additive　manufacture　25-layer　thin-walled　2Cr13　parts　is　suitable　between　120~210　s.　©　2019,　Editorial　Board　of　Transactions　of　the　China　Welding　Institution,　Magazine　Agency　Welding.　All　right　reserved.