The 220 kV column voltage transformer is an important electrical equipment in high voltage power grid. Establishing a transient circuit model of high voltage column voltage transformer is of great significance for studying its fast transient overvoltage distribution. In this paper, the broadband impedance parameters of high voltage 220 kV column voltage transformer were measured by vector network analyzer. Then, based on the internal structure of 220 kV column transformer, the transformer transient circuit model considering the influence of parasitic inductance and stray capacitance was established. The transient circuit model was compared with the measured broadband impedance parameters to verify the effectiveness of the transformer transient circuit model. Finally, the transient circuit model considering the influence of parasitic inductance and stray capacitance was used to calculate the output voltage of the secondary voltage of the column voltage transformer under the power frequency and lightning impulse voltage, and the broadband transmission characteristics of the column voltage transformer were obtained.