The invention discloses a 6063G aluminum alloy for a smartphone and a machining method of the 6063G aluminum alloy. The aluminum alloy comprises, by mass, 0.60%-0.70% of Si, 0.05%-0.08% of Fe, 0.05%-0.08% of Mn, 0.70%-0.80% of Mg, 0.01%-0.03% of Ti and the balance Al and inevitable impurities. The corresponding machining method sequentially includes eight steps including ingot casting, homogenizing annealing, hot rolling, cold rolling, intermediate solid solution treatment, secondary cold rolling, finished product annealing and final aging treatment. An aluminum product has the excellent anodic oxidation effect through the aluminum alloy ingredients and the machining method, extremely-fine 205-210-mesh zircon sand blasting treatment is met, and the 6063G aluminum alloy is a six-serial smartphone appearance piece ideal aluminum alloy material meeting the moderate strength requirement and having very high requirement for anodic oxidation treatment, and the market application prospect is wide.