Fatigue　life　estimation　of　notched　components　is　mostly　dependent　on　notch　stress　and　strain　calculation　with　non-linear　finite　element　analysis　(FEA).　For　multiaxial　cyclic　loading,　the　stress-strain　analysis　of　notch　root　is　rather　complex　and　the　non-linear　FEA　is　also　very　time-consuming.　In　this　paper,　a　new　fatigue　life　prediction　method　for　notched　components　under　multiaxial　loading　is　proposed.　First,　a　linear　elastic　solution　needs　to　be　solved　for　notched　components　under　multiaxial　cyclic　loading.　Then,　an　elastic　equivalent　parameter　is　computed　using　the　linear　elastic　solution.　On　the　basis　of　the　elastic　equivalent　parameter　combined　with　the　Neuber＇s　rule,　an　elastic-plastic　equivalent　parameter　is　obtained.　Finally,　the　elastic-plastic　equivalent　parameter　is　used　to　estimate　fatigue　crack　initiation　life　of　notched　components.　The　proposed　method　needs　only　elastically　calculated　notch　strain　history　as　the　basic　input　and　is　convenient　for　engineering　application.　The　method　is　verified　with　experimental　data　of　SAE　1045　notched　shaft　specimens　under　proportional　and　non-proportional　loading.　The　results　showed　that　the　method　can　provide　good　life　estimates.　©　(2012)　Trans　Tech　Publications,　Switzerland.