Abstract: A fuel magnetization treatment method includes mounting electromagnetic coils on a supply system through which fuel is supplied to a combustion device of an engine (7), connecting two joints of the electromagnetic coils with an electromagnetic generating device, and providing alternating current to the electromagnetic coils through the electromagnetic generating device so that an alternating current magnetic field is generated by the electromagnetic coils and is used to magnetize the fuel in the engine, where the frequency zone of the alternating current is 4 kHz˜25 kHz. The method can improve the combustion efficiency of various fuels, enhance the power output performance of the engine, inhibit the emission of various pollution gases and prolong the life of engine lubricating oil.