The invention provides a transformer outgoing wire bending apparatus, comprising a U-shaped clamp channel, a jack-bending mechanism and a wire compressing mechanism. The U-shaped clamp channel is usedfor fixing the whole apparatus to a transformer. The jack-bending mechanism and the wire compressing mechanism cooperate to synchronously bend a transformer outgoing wire. Both the jack-bending mechanism and the wire compressing mechanism are arranged on the U-shaped clamp channel. The jack-bending mechanism includes a hydraulic jack, an arc support block, a jack-bending guide rod and jack-bending arc plates. The wire compressing mechanism includes a U-shaped compressing rack and a square adjusting rod. By using the transformer outgoing wire bending apparatus, a transformer outgoing wire canbe bent at a time, labor intensity is reduced, and bending quality is improved.