The invention provides a high-strength aluminum alloy for a tent pole. The high-strength aluminum alloy consists of the following element raw materials in percentage by weight: 0.05-0.12% of Si, less than or equal to 0.18% of Fe, 2.0-2.6% of Cu, 0.18-0.35% of Cr, 6.8-7.3% of Zn, 0.02-0.04% of Ti, 2.6-3.4% of Mg and the balance Al. The aluminum alloy prepared by the preparation method is light in weight, is high in strength, saves energy and is environmentally friendly, and has the performances such as excellent surface quality and excellent corrosion resistance.