An　IPG　YLS-6000　fiber　laser　and　a　Fronius　MagicWave3000job　digital　welding　machine　are　used　in　fiber　laser-tungsten　inert　gas　(TIG)　hybrid　welding.　The　experiment　is　carried　out　on　the　aluminum　alloy　5083H116　with　a　thickness　of　4　mm.　The　effects　of　characteristic　of　power　source,　arc　current　and　distance　between　heat　sources　on　weld　shape　of　hybrid　welding　are　studied.　The　welding　defect,　microhardness　and　mechanical　properties　of　welded　joints　are　analyzed.　The　results　show　that,　weld　formation　is　improved　while　using　fiber　laser-TIG　hybrid　welding,　especially　with　variable　polarity　TIG　arc.　A　good　weld　can　be　obtained　when　the　distance　between　heat　sources　is　less　than　4　mm,　the　arc　current　is　150　A,　and　the　welding　mode　is　laser　leading　(LL)　arc　style.　The　weld　has　few　pores　and　no　cracks,　and　the　surface　is　bright　and　uniform　only　with　a　little　sag.　The　tensile　strength　of　hybrid-welded　joint　is　up　to　318　MPa,　about　93%　of　base　metal,　and　the　joint　elongation　is　7.6%;　both　are　higher　than　those　in　fiber　laser　welding.　The　tensile　fracture　is　ductile.