The high pace,high efficiency and high quality of automotive body have put forward challenge to the traditional welding process,however,it is difficult to meet requirement for high speed welding. This paper presents a novel welding process arcing-wire PAW welding process. With the new arc working mode,it is easier to achieved the new welding process which can relieved the inherent constraints in heat input and deposition,the advantages of the new welding process is the high efficiency and high welding speed and low heat input,increase the welding currents can get higher productivity and less distortion. The experimental system is established in lab,the waveforms of welding current and arc voltage are acquired through signal acquisition system,and the arc behavior and metal transfer process are monitored by high-speed camera synchronously. The results of experiments indicate that the metal transfer is stable without spatter,the droplet diameter decreased with the increase of the by-pass arc current,as the arc heat input and arc force changed accordingly. The metal transfer without spatter,the two arc have voltage fluctuation by the short between wire and work-piece. The weld formation is smooth without defects in high speed welding.