The invention discloses a low-temperature-resistant low-frequency heating device for transformers. The low-temperature-resistant low-frequency heating device for the transformers comprises a rectifying module, a filtering capacitor, an inversion module, a temperature measurement unit, a control element, a heating element and a cooling element, wherein the rectifying module, the filtering capacitor and the inversion module form a low-frequency heating device body, the heating element and the cooling element are connected with the control element, the output ends of the heating element and the cooling element are connected with the low-frequency heating device body, the temperature measurement unit is used for detecting temperatures of the rectifying module, the filtering capacitor and the inversion module and sending temperature information to the control element, the control element is used for displaying temperature values and sending control signals, and the heating element and the cooling element are used for heating or cooling the low-frequency heating device body according to the control signals. The low-temperature-resistant low-frequency heating device for the transformers can be used for start and operation of the transformers in high-cold and even gelid environments.