The present invention provides an electromagnetic apparatus with heat sink structure, comprising: metal housing, the metal housing further comprises the upper housing and the lower housing to fix the components of the electromagnetic apparatus and store the energy of the electromagnetic apparatus during operation; the electrical coil is mounted on the coil shelf and is provided with numbers of primary windings and secondary windings; the heat conductive tube is arranged in the gap of the windings for conducting the heat generated by the electrical coil to the outside of the electromagnetic apparatus. Furthermore, the conducting wire is electrically coupled to the electrical coil and transmits the input voltage and output voltage during the operation of electromagnetic apparatus.