The bending pipe welding machine is suitable for the welding application of the inner and outer arc of the stamping attachment of the land circular air pipe. The welding control unit and other aspects of the man-machine interface of the equipment are independently developed and designed, including the important welding elements such as welding current and speed, and the digital display of the man-machine interface is ully realized.And for the welding characteristics of galvanized sheet steel, in the welding control of the design of a unique welding curve, so that it can be more reliable to complete the professional needs ofgalvanized sheet welding.