Abstract: Under the influence of VFTO, the transformer coil can cause distribution of iner turn voltage, and can cause high frequency oscillation inside the transformer, which is harmful to the coil longitudinal insulation. Considering the characteristics of VFTO waveform, the capacitor network plays a major role when the waveform starts to invade the transformer. Therefore, the theoretical analysis of the influence of capacitor parameters on the VFTO distribution of windings is of vital importance. The method of trajectory sensitivity is used to study the influence of the radial and longitudinal capacitance parameters of transformer windings on the potential distribution of transformer windings. Finally, the continuous winding and kink winding are taken as the object of study, and the capacitance parameters influencing the overvoltage wave of transformer winding are traced back, and the reasonable proposal for the insulation design of the winding is provided.