Automatic carbon-dioxide-gas-arc-welding welding device

The invention relates to an automatic carbon-dioxide-gas-arc-welding welding device which comprises a pedestal, wherein a walking mechanism is arranged on the lower surface of the pedestal; a bracket, a control device, a handle and a fixing seat are arranged on the upper surface of the pedestal in sequence; an end part of the bracket is connected with a horizontal regulating rod in a hinging manner; a connecting block is arranged at an end part of the horizontal regulating rod; the connecting block is connected with a horizontal moving device A; a fixing platform is arranged on a side surface of the horizontal moving device A; a locking device B is arranged on the fixing platform; a perpendicular regulating rod is connected into the fixing platform in an insertion manner; the bottom end of the vertical regulating rod is connected with a fixing plate A; a welding gun tensioning device A is arranged at an end part of the fixing plate A; a welding gun A is arranged in the welding gun tensioning device A; a horiz