The　maximum　shear　strain　and　the　normal　strain　excursion　on　the　critical　plane　are　regarded　as　the　primary　parameters　of　the　crack　driving　force　to　establish　a　new　short　crack　model　in　this　paper.　An　equivalent　strain-based　intensity　factor　is　proposed　to　correlate　the　short　crack　growth　rate　under　multiaxial　loading.　According　to　the　short　crack　model,　a　new　method　is　proposed　for　multiaxial　fatigue　life　prediction　based　on　crack　growth　analysis.　It　is　demonstrated　that　the　method　can　be　used　under　proportional　and　non-proportional　loadings.　The　predicted　results　showed　a　good　agreement　with　experimental　lives　in　both　high-cycle　and　low-cycle　regions.