The invention discloses a magnetizer driving circuit capable of achieving superposition of a constant magnetic field and a pulsed magnetic field. According to the driving circuit, the constant magnetic field is generated by an electromagnetic coil and a magnetic conductor through 12-V direct currents, one capacitor is controlled by two switch tubes in a complementary pulsed breakover mode, and after the capacitor is isolated through a diode, the bootstrap pressure is increased to about 23 V; meanwhile, the other capacitor is controlled by the other two switch tubes in a complementary pulsed breakover mode, after the capacitor is isolated through the other diode, the bootstrap pressure is increased to 34 V, and then superposition of the constant magnetic field generated by 12-V voltage and the pulsed magnetic field generated by 34-V pulsed voltage is achieved. Therefore, the defect that the magnetic field intensity of a magnetizer is low due to the fact that the 12-V direct-current voltage of an existing general automobile inner heat engine power supply system is low is overcome, the magnetic field intensity is increased, the acting force among molecules is decreased through the effect of the pulsed magnetic field, and the magnetic susceptibility is improved.