An　arcing-wire　pulse　GTAW　welding　process　was　presented　in　this　paper.　Pulse　current　was　added　into　the　GTA　electrode　arc　between　the　non-consumableelectrode　and　the　workpiece.　Besides　the　advantages　of　separation　of　heat　and　mass　transfer　with　no　spatter,　this　process　technology　could　reduce　the　heat-affected　zone　and　the　burning　of　alloying　elementsby　controling　the　shape　andthe　penetration　of　welding　pool　with　pulse　GTAW.　It　was　tested　that　with　the　reduction　of　the　distancebetween　the　wire　and　the　workpiece,　the　droplet　transfer　changed　from　big　drops　transition　intonone　arc　contact　transition.　And　the　closer　the　distance　was,　the　faster　the　droplet　transfer　frequency　would　be.　When　the　wire　was　kept　at　a　certain　distanceto　the　workpiece,　there　was　an　optimal　frequency　that　could　achieve　the　minimum　droplet　size　with　the　welding　process　ofone　drop　withone　pulse.　©　2017,　Editorial　Board　of　Transactions　of　the　China　Welding　Institution,　Magazine　Agency　Welding.　All　right　reserved.