Efficient roller wheel tooth hard alloy surfacing system and surfacing method

The invention discloses an efficient roller wheel tooth hard alloy surfacing system and a surfacing method. The efficient roller wheel tooth hard alloy surfacing system comprises an electric control box, a cold water circulation box, a welding machine box, a rotary machine tool platform, a welding machine moving platform, a wire feeding disc and a welding bent gun. The welding machine moving platform comprises a horizontal sliding supporting beam, a sliding supporting arm and a welding gun supporting seat. The horizontal sliding supporting beam is horizontally arranged above the outer side of the rotary machine tool platform, the sliding connecting end of the sliding supporting arm is horizontally perpendicular to the horizontal sliding supporting beam and is connected to the upper surface of the horizontal sliding supporting beam in a sliding manner, the free end of the sliding supporting arm horizontally extends outwards to the position over the rotary machine tool platform, the welding gun supporting seat