The invention discloses a high-voltage transformer. The high-voltage transformer comprises a mechanism box and a transformer; the mechanism box is positioned on the left side of the transformer; the mechanism box comprises a swing gate and a driving rod; the swing gate is positioned in the mechanism box; the swing gate is connected with the driving rod; the driving rod is provided with a reset spring; the transformer comprises supporting insulators, an arc extinguish chamber and a driving base; the supporting insulators are positioned below the transformer; a fixed base is arranged on the upper right of the supporting insulators; the arc extinguish chamber is positioned in the inner side of the transformer; the arc extinguish chamber is connected with a fixed plate; the driving base is positioned at the bottom of the arc extinguish chamber; a conductive clamp is arranged in the driving base; and a power transmission outlet is formed in the right side of the conductive clamp. By virtue of the high-voltage transformer, the power transmission conversion effect can be improved, and current transmission also can be protected.