In this paper, a dynamic analysis of spinning beam subjected to axial forces considering Winkler Foundation and Pre-twisted was performed. A typicla example of a structure that spinning under tha axial force is drilling system, since the bending stiffness is decreased by axial force, it is necessary to develop and study a structural dynamic model that can understand the dynamic charadcteristic. In this study, a beam model to express the effect of reducing the bending stiffness by axial force is modeld by the Hybrid Deformation variables Modeling Method and a Moving Winkler Foundation model is used to express the stiffness distribution of work-piece that varies with time. Numerical results show that the natural frequency abruptly drops at the point of contact between the beam structure and the work-piece