Abstract: Short circuit arc welding parameters and waveform control are researched on the basis of IGBT inverter welding power supply.Under the same welding current, optimum arc voltage will decrease with the increasing of welding speed.And it is proved that hard arc is more stable under lower voltage, which is suitable for high speed welding.The relationships among energy input, arc voltage dropping speed and arc stability are studied, and it is demonstrated that a lower voltage dropping speed will lead to a higher arc energy, but the adjust time of voltage should be less than average arc time.The welding experiments prove that the weld appearance and fusion are good when the welding speed is 1.5 m/min, which meet the requirements of container manufacturing.