Laser　non-penetrating　welding　of　aluminum　alloy　has　such　problems　as　poor　weld　morphology　and　relatively　high　porosity.　In　this　paper,　the　effects　of　focus　movement　parameters　on　the　weld　formation,　weld　depth　and　pore　formation　were　investigated　during　fiber　laser　welding　of　aluminum　alloy　with　focus　rotation　and　vertical　oscillation.　Experimental　results　show　that　focus　rotation　and　vertical　oscillation　can　effectively　improve　the　weld　surface　morphology,　reduce　the　porosity　in　weld,　increase　weld　depth,　and　enhance　weld　quality　during　laser　welding　of　aluminum　alloy.　Further　analysis　shows　that　laser　focus　rotation　and　vertical　oscillation　can　actively　regulate　the　flow　and　solidification　behaviors　of　the　weld　pool,　which　can　improve　the　weld　formation　with　scaly　morphology.　Laser　focus　rotation　can　improve　the　interaction　way　between　the　laser　beam　and　keyhole　wall,　and　enlarge　the　keyhole　mouth　to　make　it　less　liable　to　collapse　or　close,　thus　significantly　reducing　the　size　and　number　of　the　keyhole-induced　pores.　Vertical　oscillation　of　laser　beam　focus　with　appropriate　amplitudes　can　increase　weld　depth,　improve　welding　efficiency,　and　reduce　the　negative　influence　of　focus　rotation　on　weld　depth.