Abstract: The waveform control project is the key of realizing better control for CO₂ short-circuiting welding.For the shortage of extension adaptability for constant-current waveform control project and the higher probability of transient short circuit occurring due to the bigger repulsion effect of droplet in arcing evening for constant-voltage waveform control project, a new waveform control method, NWC(natural waveform control), is brought forward.In order to reduce the repulsion effect of the droplet and realize the natural short circuiting transfer, the method not only adopts slope control mode in arc period and short-circuiting period, but also can automatically module waveform control parameters with the time and space information for short circuit welding.The experiment results validate the NWC project has the characteristics of improving the natural short circuit transfer, good regular waveform control effect and better arc stability.