In　this　paper,　the　nonlinear　dynamic　responses　of　the　blade　with　variable　thickness　are　investigated　by　simulating　it　as　a　rotating　pretwisted　cantilever　conical　shell　with　variable　thickness.　The　governing　equations　of　motion　are　derived　based　on　the　von　Karman　nonlinear　relationship,　Hamilton＇s　principle,　and　the　first-order　shear　deformation　theory.　Galerkin＇s　method　is　employed　to　transform　the　partial　differential　governing　equations　of　motion　to　a　set　of　nonlinear　ordinary　differential　equations.　Then,　some　important　numerical　results　are　presented　in　terms　of　significant　input　parameters.