Abstract: Based on the theory of geometrically-exact beam, a geometrically-exact finite element formulation of dynamical two-dimensional piezoelectric layered-beam is developed, in which the coupling effect of piezoelectric material is fully taken into consideration. The implementation of the proposed formulation leads to an efficient scheme for analyzing piezoelectric structures with large-scale motion. Three numerical examples are presented and the numerical results are compared with those obtained using ANSYS as well as with those in the literature. The accuracy and effectiveness of the present formulation is verified.