Abstract: Electromagnetic Acoustic Technique(EMAT) has been widely used in many engineering applications due to its advantages over other conventional Ultrasonic Testing(UT) techniques in terms of non-contact inspection, rapid scanning and high evaluation efficiency. In this paper, an algorithm and the corresponding numerical code have been developed for simulation of the magnetization in the ferromagnetic material based on the Maxwell-equations and the equivalent polarization method. The numerical simulation code has been developed on the basis of the FEM-BEM hybrid method, and the magnetic current model is adopted to calculate the magnetic field due to the permanent magnet. The validities of the proposed algorithm and the developed numerical code are demonstrated via comparison between the numerical results of ANSYS and the present method.