The invention relates to a main transformer cooling fan with a turbocharging function and a use method. The main transformer cooling fan with the turbocharging function comprises a main transformer body, a conservator and a plurality of main transformer radiators, wherein the conservator and the main transformer radiators are connected with the main transformer body; the oil inlet and the oil outlet of each main transformer radiator are respectively connected to the corresponding oil outlet and oil inlet of the main transformer body. The main transformer cooling fan is characterized in that each main transformer radiator is correspondingly provided with a turbocharging fan-blade-free main transformer cooling fan, and the main transformer body is provided with an on-line oil temperature sensor; the turbocharging fan-blade-free main transformer cooling fans and the on-line oil temperature sensor are all electrically connected to one control module. The blowing cooling mode of the main transformer cooling fan has the advantages of high efficiency, low energy consumption and small resistance and noise. Since the main transformer cooling fan is not provided with fan blades, no dangers exist, and the main transformer cooling fan can be more stably used and can be more conveniently maintained and cleaned. Compared with the traditional main transformer cooling fan, the main transformer cooling fan has incomparable huge advantages and is an innovation of operation of the main transformer cooling fan.