Abstract: On the base of existing conclusion of Zhukovssky transform, the magnetic field of a linear current and a bar-type ferromagnetic material plate is calculated by using the cylindrical images method, and its magnetic vector distribution and magnetic induction line equation are obtained. The magnetic induction line maps are plotted by using the software MATLAB.

Key words: linear current, bar-type ferromagnetic material plate, Zhukovssky transform, mirror image method, magnetic vector