In　the　gas　metal　arc　welding　process　with　short　circuiting　transfer　mode　has　un-regularity,　poor　arc　stability,　larger　spatter,　and　poor　weld　form,　the　horizontal　pulsed　auxiliary　magnetic　field　in　the　short　circuiting　transfer　welding　process　was　established.　According　to　short　circuiting　transfer　period　Tc　and　its　coefficient　of　variation　CV,　optimize　the　applied　auxiliary　magnetic　field　and　the　MIG/MAG　welding　process　parameters.　The　controlled　auxiliary　magnetic　field　can　reduce　both　of　the　arc　short　circuiting　transfer　period　Tc,　and　the　coefficient　of　variation　CV.　When　the　statistical　average　of　the　pulsed　magnetic　field　duration　ton　take　value　for　the　specific　welding　parameters　short　circuiting　time　T1,　making　short　circuiting　transfer　period　tends　to　be　uniform.　The　experiments　show　that　make　the　applied　magnetic　field　strength　appropriate　arc　short　circuiting　transfer　period　Tc　and　the　coefficient　of　variation　CV　lower,　it　can　accelerate　the　disconnection　of　the　short　circuiting　transfer　liquid　bridge,　reduce　the　short　circuiting　peak　welding　current,　thereby　reducing　the　energy　accumulation　at　the　end　of　the　short　circuiting　transfer,　so　as　to　reduce　the　electrical　explosion　spatter　loss　rate　of　the　process　and　keep　the　metal　transfer　stable.