In　this　paper,　a　method　based　on　the　improved　effective　stress　concentration　factor　is　proposed　to　estimate　the　local　stress-strain　for　tenon　joint　structure　under　multiaxial　cyclic　loading　at　non-isothermal　high　temperature.　In　order　to　consider　the　effect　of　changing　temperature　on　material　properties,　the　impact　caused　by　temperature　on　the　stress-strain　response　needs　to　be　introduced　to　the　parameters　of　material　constitutive　model.　So　that,　each　material　parameter　in　viscoplastic　constitutive　model　is　expressed　as　a　function　of　temperature.　In　addition,　the　computing　method　of　the　effective　stress　concentration　factor　is　improved　so　as　to　solve　the　problem　of　the　overestimation　for　local　stress-strain　of　tenon　joint　structure　in　the　Neuber　rule.　Moreover,　the　proposed　notch　correction　method　is　coupled　with　the　Chaboche　unified　viscoplastic　constitutive　model　to　estimate　the　local　stress-strain　of　tenon　joint　structure　at　non-isothermal　high-temperature　condition.　To　verify　the　reliability　of　the　proposed　method,　the　calculation　results　are　compared　with　the　nonlinear　finite　element　analysis　results　under　various　loading　paths　at　non-isothermal　high-temperature　condition.　The　results　showed　that　the　proposed　method　can　accurately　estimate　the　notch　stress　and　strain　under　multiaxial　thermo-mechanical　cyclic　loading.