Disclosed is a 6410 aluminium alloy for bright anodic oxidation. The 6410 aluminium alloy is prepared by smelting 99.99wt. % of high purity refined aluminum, silicon (Si), copper (Cu), magnesium (Mg), titanium (Ti) and carbon (C), wherein by weight, the Si is 0.35wt. %-0.55wt. %, the Cu is 0.08wt. %-0.14wt. %, the Mg is 0.35wt. %-0.70wt. %, the Ti is 0.006wt. %-0.012wt. %, and a trace of the C is equivalent to one twentieth of the content of the Ti; and ferrum (Fe) is equal to or smaller than 0.04wt. %, other impurities are equal to or smaller than 0.01wt. %, the balance is aluminum, the Si, the Cu, the Mg and the Ti are active ingredients, the Fe is a main impurity element, and the weight of the Fe is required to be limited. The preparation method of the 6410 aluminium alloy includes that high purity refined aluminum ingots are subjected to heating and smelting to obtain an aluminum liquid, the Si, the Cu and the Mg are added, flow quantity of the aluminum liquid is set when the aluminum liquid flows through a runner, the aluminum liquid is led to a casting furnace, the Ti and the C are continuously added into the aluminum liquid runner according to the requirement, the aluminum liquid is subjected to refining and filtering by means of on-line argon, and standard aluminum bars are obtained after hot-top casting. The 6410 aluminum alloy can be used for manufacturing bright anodic oxidation automobile exterior trimming parts.