Straight seam automatic welding machine, optional servo and stepper motor drives, high degree of automation, simple operation, easy to use, the welding quality is stable and reliable is widely used and auto parts production, fire equipment, solar energy production and manufacturing, etc. According to the product need optional gas shielded arc welding, argon arc welding, submerged arc welding, etc. Can be customized according to customer's different requirement specification, straight seam welding machine.