In　this　paper,　a　notch　stress　correction　method　based　on　the　structural　yield　surface　is　proposed,　in　which　the　actual　stress　increment　at　the　notch　root　can　be　obtained　by　multiplying　two　quantities,　that　is,　the　pseudo　stress　increment　and　the　ratio　of　the　slopes　of　the　material　and　structural　stress-strain　curves.　In　the　proposed　method,　the　influence　of　temperature　on　the　notch　stress　correction　can　be　taken　into　account,　and　no　iteration　is　required　during　the　calculation　process.　Moreover,　based　on　the　proposed　notch　correction　method　and　a　unified　viscoplastic　constitutive　model　at　high　temperature　condition,　a　notch　stress-strain　estimation　method　is　developed　under　multiaxial　thermo-mechanical　cyclic　loading.　In　order　to　assess　the　prediction　accuracy　of　the　proposed　method,　the　calculated　results　are　correlated　to　those　from　thermal-structural　non-linear　finite　element　analysis　under　various　proportional　and　non-proportional　mechanical　loadings　at　non-isothermal　high　temperature　condition.　The　comparison　between　the　calculated　and　analyzed　results　shows　that　the　proposed　method　can　precisely　estimate　the　notch　stress　and　strain　under　multiaxial　thermo-mechanical　cyclic　loading.　(C)　2020　Elsevier　Ltd.　All　rights　reserved.