Abstract: This paper studied the dynamic behaviors of the circular conductive thin plate subjected to an externally impulsive magnetic field. The governing equation of eddy current and the electromagnetic forces are derived based on Maxwell’s equations and T-method of eddy current, which has been widely used in the analysis of conductive and superconductive structures. The finite element formulation of the electro magneto- mechanics coupling problems are also presented. Then a numerical code based on FEM is developed to quantitatively simulate the characteristics of the magnetic field of coils with electric current, and the dynamic response of the circular conductive plate under a pulse magnetic field. Some characteristic curves, such as the distribution of eddy current, the electromagnetic forces and the amplitude of plate varying with the applied current, are displayed.