An aluminum alloy used for a seawater corrosion resisting tubular product is characterized by comprising the following elements including, by mass percent, 0%-0.05% of Si, 0%-0.12% of Fe, 0%-0.004% of Cu, 2.2%-2.4% of Mg, 0%-0.004% of Zn, 0.01%-0.02% of Ti, 0.1%-0.2% of Re and the balance Al. The prepared aluminum alloy has the beneficial effects of being light in mass, high in specific strength, long in service life, high in heat efficiency, good in corrosion resistance and the like.