By　adjusting　the　inter-wire　arc　(IWA)　posture,　the　skew-coupling　arc　(SCA)　is　proposed　to　address　the　polar　effect　in　the　cross　arc,　enabling　decoupling　control　of　heat,　force,　and　mass　transfer.　Despite　the　advancement,　the　arc　stabilization　mechanism　in　the　SCA　remains　poorly　understood,　hindering　its　application　as　a　heat　source　in　welding　or　additive　manufacturing.　To　elucidate　this　mechanism,　various　influencing　factors　such　as　power　supply　characteristics,　shielding　gas　composition,　IWA　posture,　and　plasma　main　arc　(PMA)　were　analyzed.　An　electrical　signal　and　high-speed　camera　synchronous　acquisition　system　was　utilized　to　analyze　current-voltage　waveforms　and　arc　shapes.　The　results　indicate　that　the　arc　stability　of　the　SCA　can　be　enhanced　by　ensuring　specific　external　conditions.　Constant　voltage　power　supply　enhances　the　self-regulating　effect　of　the　IWA,　maintaining　the　IWA　and　the　PMA　in　a　hybrid　state　at　all　times.　Introducing　an　oxidizing　gas　to　the　shielding　gas　can　effectively　suppress　cathode　spot　climbing　and　stabilize　the　IWA.　The　vertical　spacing　between　wires　directly　impacts　the　PMA　deflection,　while　the　wire　horizontal　angle　has　a　lesser　effect.　The　heat-regulating　effect　of　the　PMA　column　boosts　the　arc　length　regulation　by　the　IWA.　The　current　and　the　ion　gas　flow　rate　in　the　PMA　minimally　influence　the　SCA　stability.　These　findings　can　provide　a　solid　foundation　for　further　applications　of　the　SCA　as　heat　source.　©　2024　The　Authors