The natural frequencies and the dynamic response of a rotating tapered cantilever Euler Bernoulli beam were investigated. The height and the width of the tapered beam vary linearly along its length. The approach of Bezier curve interpolation was used to describe the deformation of the flexible beam. Both the transversal and the longitudinal deformations of the flexible beam were considered. And in the total longitudinal deformation, the non linear coupling term, also known as the longitudinal shortening caused by transversal deformation, was considered. The rigid flexible coupling dynamic equations of the system were established via employing the second kind of Lagrange's equation. A software package for the dynamic simulation of the rotating tapered cantilever beam was developed. Then the natural frequencies and the dynamic response of the rotating tapered cantilever beam were investigated and compared. The simulation shows that dynamics response and natural frequencies of different tapered beams will be significantly different. Reasonable modeling of the actual system will be necessary to get more accurate simulation results.