In　this　paper,　aerodynamic　expressions　in　forms　of　the　series　and　the　polynomial　for　a　blade　with　low　speed　in　low　pressure　compressor　are　deduced　by　numerical　simulation.　Considering　shear　deformation　and　cross-section　warping　effect,　the　blade　is　simplified　as　a　pre-twist,　pre-setting　rotating　cantilever　plate,　which　subjected　to　the　aerodynamic　force　and　the　centrifugal　force.　Based　on　the　first-order　shear　deformation　theory　and　von-Karman　nonlinear　geometric　relationship,　nonlinear　partial　differential　dynamic　equation　of　the　rotating　blade　is　derived　by　using　Hamilton　principle.　Equations　of　motion　are　converted　into　a　series　of　ordinary　differential　equations　using　Galerkin　method.　The　dynamic　frequency　and　the　dynamic　deformation　of　the　blade　are　explored　and　contrasted　with　results　obtained　by　finite　element　method.　Effects　of　parameters　on　vibration　characteristics　of　the　blade　under　different　rotation　speed　are　analyzed.　Results　show　that　the　explicit　expression　of　the　aerodynamic　force　for　the　blade　has　a　good　applicability.