The invention relates to an electronic current and voltage combined transformer for support column type gas insulation. The electronic current and voltage combined transformer comprises a head for installing a primary conductor and a Rogowski coil current transformer, a bottom for installing a collection unit and a support column part for setting a vertical type coaxial capacitor voltage divider, wherein the coaxial capacitor voltage divider comprises a high voltage capacitor and a low voltage capacitor; the vertical type coaxial capacitor voltage divider is provided with at least two low voltage capacitors; and each low voltage capacitor forms one path of voltage transformer output. A voltage transformer with double sensing heads has the advantages of being miniaturized, high in anti-interference performance, high in precision, high in reliability, low in cost and the like.