In　this　paper,　the　integrated　laser　welding　head　with　a　continuously　adjustable　focus　rotation　radius　was　achieved　by　using　the　output　shaft　(hollow　shaft)　of　the　high-frequency　motor　as　the　laser　transmission　tube　for　laser　transmission,　laser　deflection　and　laser　focus　rotation.　The　continuous　adjustment　of　the　focus　rotation　radius　was　achieved　by　changing　the　relative　phase　angle　between　the　two　wedge　prisms　and　using　a　focusing　lens.　And　the　function　relationship　between　the　focal　rotation　radius　and　the　relative　phase　angle　of　two　wedge　prisms　is　verified　and　modified　based　on　the　measured　results.　The　energy　loss　rate　of　the　5　kW　laser　through　the　inner　diameter　of　the　hollow　shaft　is　less　than　5%　and　it　has　little　effect　on　weld　depth.　The　temperature　of　the　hollow　shaft　can　rise　to　57.4　degrees　C　only　at　the　entrance　of　the　hollow　shaft　under　the　long　action　time　(120　s)　of　high-power　(6　kW)　laser.　Both　the　weld　forming　and　porosity　defects　of　5083　aluminium　alloy　can　be　effectively　regulated　and　controlled　by　using　the　integrated　laser　welding　head.