In　this　chapter,　nonlinear　dynamic　behaviors　of　the　variable　cross-section　rotating　blades　are　studied.　The　blade　is　considered　to　be　a　rotating　cantilever　plate　model　with　variable　cross-section.　Considering　the　influence　of　centrifugal　force,　variable　rotating　speed　and　cross-section　warp.　In　the　light　of　the　Hamilton＇s　principle,　the　von　Karman　deformation　theory　and　the　third-order　shear　deformation　theory,　we　can　derive　the　ordinary　differential　equation　by　using　Galerkin　method　from　the　nonlinear　partial　differential　equations.　The　multiple　scales　is　applied　to　get　the　averaged　equations　with　the　1:3　internal　resonance　of　the　rotating　blades.　Using　numerical　simulation　to　study　the　effects　of　aerodynamic　forces　and　disturbance　amplitude　of　the　rotating　blades　on　nonlinear　dynamic　behaviors.　It　shows　that　the　rotating　blades　performs　complex　nonlinear　dynamic　behaviors,　such　as　single　periodic,　chaotic　motions,　multiple　periodic　and　quasi-periodic.　©　Published　under　licence　by　IOP　Publishing　Ltd.